972320681 has 4 divisors (see below), whose sum is σ = 984035472. Its totient is φ = 960605892.

The previous prime is 972320659. The next prime is 972320717. The reversal of 972320681 is 186023279.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 972320681 - 2¹⁰ = 972319657 is a prime.

It is a super-2 number, since 2×972320681² = 1890815013400607522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (972320621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5857271 + ... + 5857436.

It is an arithmetic number, because the mean of its divisors is an integer number (246008868).

Almost surely, 2^972320681 is an apocalyptic number.

It is an amenable number.

972320681 is a deficient number, since it is larger than the sum of its proper divisors (11714791).

972320681 is a wasteful number, since it uses less digits than its factorization.

972320681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11714790.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 972320681 is about 31182.0570360584. The cubic root of 972320681 is about 990.6870994531.

The spelling of 972320681 in words is "nine hundred seventy-two million, three hundred twenty thousand, six hundred eighty-one".