972644161 has 2 divisors, whose sum is σ = 972644162. Its totient is φ = 972644160.

The previous prime is 972644149. The next prime is 972644173. The reversal of 972644161 is 161446279.

It is a balanced prime because it is at equal distance from previous prime (972644149) and next prime (972644173).

It can be written as a sum of positive squares in only one way, i.e., 870250000 + 102394161 = 29500^2 + 10119^2 .

It is a cyclic number.

It is not a de Polignac number, because 972644161 - 2¹⁷ = 972513089 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (972644131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486322080 + 486322081.

It is an arithmetic number, because the mean of its divisors is an integer number (486322081).

Almost surely, 2^972644161 is an apocalyptic number.

It is an amenable number.

972644161 is a deficient number, since it is larger than the sum of its proper divisors (1).

972644161 is an equidigital number, since it uses as much as digits as its factorization.

972644161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 40.

The square root of 972644161 is about 31187.2435620720. The cubic root of 972644161 is about 990.7969507045.

The spelling of 972644161 in words is "nine hundred seventy-two million, six hundred forty-four thousand, one hundred sixty-one".