Search a number
-
+
7641 = 33283
BaseRepresentation
bin1110111011001
3101111000
41313121
5221031
655213
731164
oct16731
911430
107641
115817
124509
13362a
142adb
1523e6
hex1dd9

7641 has 8 divisors (see below), whose sum is σ = 11360. Its totient is φ = 5076.

The previous prime is 7639. The next prime is 7643. The reversal of 7641 is 1467.

It is an interprime number because it is at equal distance from previous prime (7639) and next prime (7643).

It is not a de Polignac number, because 7641 - 21 = 7639 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 7641.

It is not an unprimeable number, because it can be changed into a prime (7643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115 + ... + 168.

It is an arithmetic number, because the mean of its divisors is an integer number (1420).

27641 is an apocalyptic number.

It is an amenable number.

7641 is a deficient number, since it is larger than the sum of its proper divisors (3719).

7641 is a wasteful number, since it uses less digits than its factorization.

7641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292 (or 286 counting only the distinct ones).

The product of its digits is 168, while the sum is 18.

The square root of 7641 is about 87.4128137060. The cubic root of 7641 is about 19.6962432820.

The spelling of 7641 in words is "seven thousand, six hundred forty-one".

Divisors: 1 3 9 27 283 849 2547 7641