74624431 has 4 divisors (see below), whose sum is σ = 85285072. Its totient is φ = 63963792.

The previous prime is 74624423. The next prime is 74624437. The reversal of 74624431 is 13442647.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13442647 = 907 ⋅14821.

It is a cyclic number.

It is not a de Polignac number, because 74624431 - 2³ = 74624423 is a prime.

It is a super-2 number, since 2×74624431² = 11137611404147522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74624393 and 74624402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74624437) 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, 5330310 + ... + 5330323.

It is an arithmetic number, because the mean of its divisors is an integer number (21321268).

Almost surely, 2^74624431 is an apocalyptic number.

74624431 is a deficient number, since it is larger than the sum of its proper divisors (10660641).

74624431 is a wasteful number, since it uses less digits than its factorization.

74624431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10660640.

The product of its digits is 16128, while the sum is 31.

The square root of 74624431 is about 8638.5433378551. The cubic root of 74624431 is about 421.0112273511.

The spelling of 74624431 in words is "seventy-four million, six hundred twenty-four thousand, four hundred thirty-one".