Search a number
-
+
7489690849 = 37223392
BaseRepresentation
bin1101111100110101…
…11001110011100001
3201022222011201100101
412332122321303201
5110314330101344
63235110022401
7353413215244
oct67632716341
921288151311
107489690849
1131a380a653
121550347a01
139248bb844
145109cb25b
152dc7e79d4
hex1be6b9ce1

7489690849 has 9 divisors (see below), whose sum is σ = 7700878227. Its totient is φ = 7284151224.

The previous prime is 7489690841. The next prime is 7489690853. The reversal of 7489690849 is 9480969847.

The square root of 7489690849 is 86543.

It is a perfect power (a square), and thus also a powerful number.

7489690849 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6701878225 + 787812624 = 81865^2 + 28068^2 .

It is not a de Polignac number, because 7489690849 - 23 = 7489690841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7489690841) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3200922 + ... + 3203260.

Almost surely, 27489690849 is an apocalyptic number.

7489690849 is the 86543-rd square number.

7489690849 is the 43272-nd centered octagonal number.

It is an amenable number.

7489690849 is a deficient number, since it is larger than the sum of its proper divisors (211187378).

7489690849 is an frugal number, since it uses more digits than its factorization.

7489690849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4752 (or 2376 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 64.

The cubic root of 7489690849 is about 1956.5365435257.

Multiplying 7489690849 by its sum of digits (64), we get a square (479340214336 = 6923442).

The spelling of 7489690849 in words is "seven billion, four hundred eighty-nine million, six hundred ninety thousand, eight hundred forty-nine".

Divisors: 1 37 1369 2339 86543 3202091 5470921 202424077 7489690849