972494721 has 32 divisors (see below), whose sum is σ = 1601389440. Its totient is φ = 578260800.

The previous prime is 972494711. The next prime is 972494759. The reversal of 972494721 is 127494279.

It is a happy number.

972494721 is a `hidden beast` number, since 97 + 2 + 494 + 72 + 1 = 666.

It is not a de Polignac number, because 972494721 - 2⁶ = 972494657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (972494711) 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 31 ways as a sum of consecutive naturals, for example, 15150 + ... + 46631.

It is an arithmetic number, because the mean of its divisors is an integer number (50043420).

Almost surely, 2^972494721 is an apocalyptic number.

It is an amenable number.

972494721 is a deficient number, since it is larger than the sum of its proper divisors (628894719).

972494721 is a wasteful number, since it uses less digits than its factorization.

972494721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61854 (or 61848 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 972494721 is about 31184.8476186753. The cubic root of 972494721 is about 990.7462050890.

The spelling of 972494721 in words is "nine hundred seventy-two million, four hundred ninety-four thousand, seven hundred twenty-one".