972440321 has 4 divisors (see below), whose sum is σ = 973236672. Its totient is φ = 971643972.

The previous prime is 972440303. The next prime is 972440323. The reversal of 972440321 is 123044279.

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 972440321 - 2⁶ = 972440257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (972440323) 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, 396341 + ... + 398786.

It is an arithmetic number, because the mean of its divisors is an integer number (243309168).

Almost surely, 2^972440321 is an apocalyptic number.

It is an amenable number.

972440321 is a deficient number, since it is larger than the sum of its proper divisors (796351).

972440321 is a wasteful number, since it uses less digits than its factorization.

972440321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796350.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 972440321 is about 31183.9753880098. The cubic root of 972440321 is about 990.7277310903.

The spelling of 972440321 in words is "nine hundred seventy-two million, four hundred forty thousand, three hundred twenty-one".