972998651 has 2 divisors, whose sum is σ = 972998652. Its totient is φ = 972998650.

The previous prime is 972998639. The next prime is 972998687. The reversal of 972998651 is 156899279.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-972998651 is a prime.

It is not a weakly prime, because it can be changed into another prime (972994651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486499325 + 486499326.

It is an arithmetic number, because the mean of its divisors is an integer number (486499326).

Almost surely, 2^972998651 is an apocalyptic number.

972998651 is a deficient number, since it is larger than the sum of its proper divisors (1).

972998651 is an equidigital number, since it uses as much as digits as its factorization.

972998651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2449440, while the sum is 56.

The square root of 972998651 is about 31192.9262974797. The cubic root of 972998651 is about 990.9173047402.

The spelling of 972998651 in words is "nine hundred seventy-two million, nine hundred ninety-eight thousand, six hundred fifty-one".