74991957 has 8 divisors (see below), whose sum is σ = 102314784. Its totient is φ = 48831888.

The previous prime is 74991953. The next prime is 74991977. The reversal of 74991957 is 75919947.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 74991957 - 2² = 74991953 is a prime.

It is a super-2 number, since 2×74991957² = 11247587229379698, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74991953) 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, 290538 + ... + 290795.

It is an arithmetic number, because the mean of its divisors is an integer number (12789348).

Almost surely, 2^74991957 is an apocalyptic number.

It is an amenable number.

74991957 is a deficient number, since it is larger than the sum of its proper divisors (27322827).

74991957 is a wasteful number, since it uses less digits than its factorization.

74991957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581379.

The product of its digits is 714420, while the sum is 51.

The square root of 74991957 is about 8659.7896625726. The cubic root of 74991957 is about 421.7012571588.

The spelling of 74991957 in words is "seventy-four million, nine hundred ninety-one thousand, nine hundred fifty-seven".