974664991 has 16 divisors (see below), whose sum is σ = 1008570240. Its totient is φ = 941402880.

The previous prime is 974664967. The next prime is 974665007. The reversal of 974664991 is 199466479.

It is a happy number.

974664991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 974664991 - 2²³ = 966276383 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 (974664931) 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, 1474201 + ... + 1474861.

It is an arithmetic number, because the mean of its divisors is an integer number (63035640).

Almost surely, 2^974664991 is an apocalyptic number.

974664991 is a deficient number, since it is larger than the sum of its proper divisors (33905249).

974664991 is a wasteful number, since it uses less digits than its factorization.

974664991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074.

The product of its digits is 2939328, while the sum is 55.

The square root of 974664991 is about 31219.6250938412. The cubic root of 974664991 is about 991.4826578465.

The spelling of 974664991 in words is "nine hundred seventy-four million, six hundred sixty-four thousand, nine hundred ninety-one".