74909531 has 16 divisors (see below), whose sum is σ = 80870400. Its totient is φ = 69138048.

The previous prime is 74909509. The next prime is 74909537. The reversal of 74909531 is 13590947.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-74909531 is a prime.

It is a super-2 number, since 2×74909531² = 11222875669279922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74909537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313310 + ... + 313548.

It is an arithmetic number, because the mean of its divisors is an integer number (5054400).

Almost surely, 2^74909531 is an apocalyptic number.

74909531 is a deficient number, since it is larger than the sum of its proper divisors (5960869).

74909531 is a wasteful number, since it uses less digits than its factorization.

74909531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 74909531 is about 8655.0292316086. The cubic root of 74909531 is about 421.5466988481.

The spelling of 74909531 in words is "seventy-four million, nine hundred nine thousand, five hundred thirty-one".