972911617 has 2 divisors, whose sum is σ = 972911618. Its totient is φ = 972911616.

The previous prime is 972911603. The next prime is 972911659. The reversal of 972911617 is 716119279.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 963233296 + 9678321 = 31036^2 + 3111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-972911617 is a prime.

It is not a weakly prime, because it can be changed into another prime (972911677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486455808 + 486455809.

It is an arithmetic number, because the mean of its divisors is an integer number (486455809).

Almost surely, 2^972911617 is an apocalyptic number.

It is an amenable number.

972911617 is a deficient number, since it is larger than the sum of its proper divisors (1).

972911617 is an equidigital number, since it uses as much as digits as its factorization.

972911617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628, while the sum is 43.

The square root of 972911617 is about 31191.5311743428. The cubic root of 972911617 is about 990.8877582558.

The spelling of 972911617 in words is "nine hundred seventy-two million, nine hundred eleven thousand, six hundred seventeen".