33813957 has 4 divisors (see below), whose sum is σ = 45085280. Its totient is φ = 22542636.

The previous prime is 33813943. The next prime is 33813961. The reversal of 33813957 is 75931833.

33813957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 33813957 - 2¹² = 33809861 is a prime.

It is a super-2 number, since 2×33813957² = 2286767375995698, 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 (33813907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5635657 + ... + 5635662.

It is an arithmetic number, because the mean of its divisors is an integer number (11271320).

Almost surely, 2^33813957 is an apocalyptic number.

It is an amenable number.

33813957 is a deficient number, since it is larger than the sum of its proper divisors (11271323).

33813957 is a wasteful number, since it uses less digits than its factorization.

33813957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11271322.

The product of its digits is 68040, while the sum is 39.

The square root of 33813957 is about 5814.9769561022. The cubic root of 33813957 is about 323.3692097742.

The spelling of 33813957 in words is "thirty-three million, eight hundred thirteen thousand, nine hundred fifty-seven".