971992970 has 32 divisors (see below), whose sum is σ = 1919734992. Its totient is φ = 352115712.

The previous prime is 971992927. The next prime is 971992979. The reversal of 971992970 is 79299179.

It can be written as a sum of positive squares in 8 ways, for example, as 237745561 + 734247409 = 15419^2 + 27097^2 .

It is a Harshad number since it is a multiple of its sum of digits (53).

It is not an unprimeable number, because it can be changed into a prime (971992979) 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, 63647 + ... + 77426.

Almost surely, 2^971992970 is an apocalyptic number.

971992970 is a deficient number, since it is larger than the sum of its proper divisors (947742022).

971992970 is a wasteful number, since it uses less digits than its factorization.

971992970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141146.

The product of its (nonzero) digits is 642978, while the sum is 53.

The square root of 971992970 is about 31176.8017923584. The cubic root of 971992970 is about 990.5757865404.

The spelling of 971992970 in words is "nine hundred seventy-one million, nine hundred ninety-two thousand, nine hundred seventy".