74972407 has 2 divisors, whose sum is σ = 74972408. Its totient is φ = 74972406.

The previous prime is 74972399. The next prime is 74972437. The reversal of 74972407 is 70427947.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74972407 - 2³ = 74972399 is a prime.

It is a super-2 number, since 2×74972407² = 11241723622747298, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 74972407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74972437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37486203 + 37486204.

It is an arithmetic number, because the mean of its divisors is an integer number (37486204).

Almost surely, 2^74972407 is an apocalyptic number.

74972407 is a deficient number, since it is larger than the sum of its proper divisors (1).

74972407 is an equidigital number, since it uses as much as digits as its factorization.

74972407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 98784, while the sum is 40.

The square root of 74972407 is about 8658.6608086932. The cubic root of 74972407 is about 421.6646088904.

The spelling of 74972407 in words is "seventy-four million, nine hundred seventy-two thousand, four hundred seven".