74820971 has 4 divisors (see below), whose sum is σ = 74849232. Its totient is φ = 74792712.

The previous prime is 74820947. The next prime is 74820973. The reversal of 74820971 is 17902847.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74820971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74820973) 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, 9695 + ... + 15608.

It is an arithmetic number, because the mean of its divisors is an integer number (18712308).

Almost surely, 2^74820971 is an apocalyptic number.

74820971 is a deficient number, since it is larger than the sum of its proper divisors (28261).

74820971 is a wasteful number, since it uses less digits than its factorization.

74820971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28260.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 74820971 is about 8649.9116180456. The cubic root of 74820971 is about 421.3805121760.

The spelling of 74820971 in words is "seventy-four million, eight hundred twenty thousand, nine hundred seventy-one".