74020979 has 16 divisors (see below), whose sum is σ = 81204480. Its totient is φ = 67223520.

The previous prime is 74020967. The next prime is 74020993. The reversal of 74020979 is 97902047.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-74020979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74020909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49172 + ... + 50654.

It is an arithmetic number, because the mean of its divisors is an integer number (5075280).

Almost surely, 2^74020979 is an apocalyptic number.

74020979 is a deficient number, since it is larger than the sum of its proper divisors (7183501).

74020979 is a wasteful number, since it uses less digits than its factorization.

74020979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1610.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 74020979 is about 8603.5445602379. The cubic root of 74020979 is about 419.8733159117.

The spelling of 74020979 in words is "seventy-four million, twenty thousand, nine hundred seventy-nine".