974594991 has 4 divisors (see below), whose sum is σ = 1299459992. Its totient is φ = 649729992.

The previous prime is 974594977. The next prime is 974594993. The reversal of 974594991 is 199495479.

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

It is not a de Polignac number, because 974594991 - 2¹⁴ = 974578607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (974594993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162432496 + ... + 162432501.

It is an arithmetic number, because the mean of its divisors is an integer number (324864998).

Almost surely, 2^974594991 is an apocalyptic number.

974594991 is a deficient number, since it is larger than the sum of its proper divisors (324865001).

974594991 is a wasteful number, since it uses less digits than its factorization.

974594991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324865000.

The product of its digits is 3674160, while the sum is 57.

The square root of 974594991 is about 31218.5039840156. The cubic root of 974594991 is about 991.4589213325.

The spelling of 974594991 in words is "nine hundred seventy-four million, five hundred ninety-four thousand, nine hundred ninety-one".