74607921 has 12 divisors (see below), whose sum is σ = 107865472. Its totient is φ = 49693176.

The previous prime is 74607901. The next prime is 74607931. The reversal of 74607921 is 12970647.

It is a happy number.

It is not a de Polignac number, because 74607921 - 2⁶ = 74607857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74607901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8820 + ... + 15066.

Almost surely, 2^74607921 is an apocalyptic number.

It is an amenable number.

74607921 is a deficient number, since it is larger than the sum of its proper divisors (33257551).

74607921 is a wasteful number, since it uses less digits than its factorization.

74607921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7580 (or 7577 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 74607921 is about 8637.5876840701. The cubic root of 74607921 is about 420.9801767155.

The spelling of 74607921 in words is "seventy-four million, six hundred seven thousand, nine hundred twenty-one".