972923311513 has 2 divisors, whose sum is σ = 972923311514. Its totient is φ = 972923311512.

The previous prime is 972923311499. The next prime is 972923311519. The reversal of 972923311513 is 315113329279.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 794474516889 + 178448794624 = 891333^2 + 422432^2 .

It is a cyclic number.

It is not a de Polignac number, because 972923311513 - 2²¹ = 972921214361 is a prime.

It is not a weakly prime, because it can be changed into another prime (972923311519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486461655756 + 486461655757.

It is an arithmetic number, because the mean of its divisors is an integer number (486461655757).

Almost surely, 2^972923311513 is an apocalyptic number.

It is an amenable number.

972923311513 is a deficient number, since it is larger than the sum of its proper divisors (1).

972923311513 is an equidigital number, since it uses as much as digits as its factorization.

972923311513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 306180, while the sum is 46.

The spelling of 972923311513 in words is "nine hundred seventy-two billion, nine hundred twenty-three million, three hundred eleven thousand, five hundred thirteen".