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11957 = 111087
BaseRepresentation
bin10111010110101
3121101212
42322311
5340312
6131205
746601
oct27265
917355
1011957
118a90
126b05
13559a
144501
153822
hex2eb5

11957 has 4 divisors (see below), whose sum is σ = 13056. Its totient is φ = 10860.

The previous prime is 11953. The next prime is 11959. The reversal of 11957 is 75911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11957 - 22 = 11953 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533 + ... + 554.

It is an arithmetic number, because the mean of its divisors is an integer number (3264).

211957 is an apocalyptic number.

It is an amenable number.

11957 is a deficient number, since it is larger than the sum of its proper divisors (1099).

11957 is a wasteful number, since it uses less digits than its factorization.

11957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098.

The product of its digits is 315, while the sum is 23.

The square root of 11957 is about 109.3480681128. The cubic root of 11957 is about 22.8669061713.

The spelling of 11957 in words is "eleven thousand, nine hundred fifty-seven".

Divisors: 1 11 1087 11957