74918131 has 4 divisors (see below), whose sum is σ = 75162472. Its totient is φ = 74673792.

The previous prime is 74918113. The next prime is 74918143. The reversal of 74918131 is 13181947.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13181947 = 1171 ⋅11257.

It is a cyclic number.

It is not a de Polignac number, because 74918131 - 2⁷ = 74918003 is a prime.

It is a super-2 number, since 2×74918131² = 11225452705066322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74918231) 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, 121710 + ... + 122323.

It is an arithmetic number, because the mean of its divisors is an integer number (18790618).

Almost surely, 2^74918131 is an apocalyptic number.

74918131 is a deficient number, since it is larger than the sum of its proper divisors (244341).

74918131 is a wasteful number, since it uses less digits than its factorization.

74918131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244340.

The product of its digits is 6048, while the sum is 34.

The square root of 74918131 is about 8655.5260383179. The cubic root of 74918131 is about 421.5628301416.

The spelling of 74918131 in words is "seventy-four million, nine hundred eighteen thousand, one hundred thirty-one".