74992971 has 4 divisors (see below), whose sum is σ = 99990632. Its totient is φ = 49995312.

The previous prime is 74992921. The next prime is 74992979. The reversal of 74992971 is 17929947.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 74992971 - 2⁷ = 74992843 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74992971.

It is not an unprimeable number, because it can be changed into a prime (74992979) 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 3 ways as a sum of consecutive naturals, for example, 12498826 + ... + 12498831.

It is an arithmetic number, because the mean of its divisors is an integer number (24997658).

Almost surely, 2^74992971 is an apocalyptic number.

74992971 is a deficient number, since it is larger than the sum of its proper divisors (24997661).

74992971 is a wasteful number, since it uses less digits than its factorization.

74992971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24997660.

The product of its digits is 285768, while the sum is 48.

The square root of 74992971 is about 8659.8482088314. The cubic root of 74992971 is about 421.7031578211.

The spelling of 74992971 in words is "seventy-four million, nine hundred ninety-two thousand, nine hundred seventy-one".