979230972721 has 3 divisors (see below), whose sum is σ = 979231962283. Its totient is φ = 979229983160.

The previous prime is 979230972719. The next prime is 979230972757. The reversal of 979230972721 is 127279032979.

The square root of 979230972721 is 989561.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 127279032979 = 7 ⋅18182718997.

It can be written as a sum of positive squares in only one way, i.e., 702765332721 + 276465640000 = 838311^2 + 525800^2 .

It is not a de Polignac number, because 979230972721 - 2¹ = 979230972719 is a prime.

It is a super-2 number, since 2×979230972721² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (979230972791) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 494781 + ... + 1484341.

Almost surely, 2^979230972721 is an apocalyptic number.

979230972721 is the 989561-st square number.

979230972721 is the 494781-st centered octagonal number.

It is an amenable number.

979230972721 is a deficient number, since it is larger than the sum of its proper divisors (989562).

979230972721 is an frugal number, since it uses more digits than its factorization.

979230972721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1979122 (or 989561 counting only the distinct ones).

The product of its (nonzero) digits is 6001128, while the sum is 58.

The spelling of 979230972721 in words is "nine hundred seventy-nine billion, two hundred thirty million, nine hundred seventy-two thousand, seven hundred twenty-one".