972393893 has 4 divisors (see below), whose sum is σ = 972647820. Its totient is φ = 972139968.

The previous prime is 972393871. The next prime is 972393911. The reversal of 972393893 is 398393279.

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

It can be written as a sum of positive squares in 2 ways, for example, as 248945284 + 723448609 = 15778^2 + 26897^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-972393893 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 (972393193) 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, 121130 + ... + 128907.

It is an arithmetic number, because the mean of its divisors is an integer number (243161955).

Almost surely, 2^972393893 is an apocalyptic number.

It is an amenable number.

972393893 is a deficient number, since it is larger than the sum of its proper divisors (253927).

972393893 is a wasteful number, since it uses less digits than its factorization.

972393893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253926.

The product of its digits is 2204496, while the sum is 53.

The square root of 972393893 is about 31183.2309583212. The cubic root of 972393893 is about 990.7119638025.

The spelling of 972393893 in words is "nine hundred seventy-two million, three hundred ninety-three thousand, eight hundred ninety-three".