Search a number
-
+
7681023 = 327121921
BaseRepresentation
bin11101010011001111111111
3112110020101100
4131103033333
53431243043
6432344143
7122200440
oct35231777
915406340
107681023
114376959
1226a5053
13178c1ac
14103d2c7
15a1acd3
hex7533ff

7681023 has 12 divisors (see below), whose sum is σ = 12679888. Its totient is φ = 4389120.

The previous prime is 7681021. The next prime is 7681031. The reversal of 7681023 is 3201867.

It is not a de Polignac number, because 7681023 - 21 = 7681021 is a prime.

It is a super-2 number, since 2×76810232 = 117996228653058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7681021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60898 + ... + 61023.

Almost surely, 27681023 is an apocalyptic number.

7681023 is a deficient number, since it is larger than the sum of its proper divisors (4998865).

7681023 is a wasteful number, since it uses less digits than its factorization.

7681023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121934 (or 121931 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 7681023 is about 2771.4658576284. The cubic root of 7681023 is about 197.3057257483.

The spelling of 7681023 in words is "seven million, six hundred eighty-one thousand, twenty-three".

Divisors: 1 3 7 9 21 63 121921 365763 853447 1097289 2560341 7681023