74164921 has 4 divisors (see below), whose sum is σ = 74274192. Its totient is φ = 74055652.

The previous prime is 74164901. The next prime is 74164933. The reversal of 74164921 is 12946147.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 74164921 - 2⁵ = 74164889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74164901) 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, 53611 + ... + 54976.

It is an arithmetic number, because the mean of its divisors is an integer number (18568548).

Almost surely, 2^74164921 is an apocalyptic number.

It is an amenable number.

74164921 is a deficient number, since it is larger than the sum of its proper divisors (109271).

74164921 is a wasteful number, since it uses less digits than its factorization.

74164921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109270.

The product of its digits is 12096, while the sum is 34.

The square root of 74164921 is about 8611.9057705017. The cubic root of 74164921 is about 420.1453030888.

The spelling of 74164921 in words is "seventy-four million, one hundred sixty-four thousand, nine hundred twenty-one".