979952721 has 32 divisors (see below), whose sum is σ = 1521607680. Its totient is φ = 554702400.

The previous prime is 979952719. The next prime is 979952723. The reversal of 979952721 is 127259979.

It is an interprime number because it is at equal distance from previous prime (979952719) and next prime (979952723).

It is not a de Polignac number, because 979952721 - 2¹ = 979952719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (979952723) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33511 + ... + 55523.

It is an arithmetic number, because the mean of its divisors is an integer number (47550240).

Almost surely, 2^979952721 is an apocalyptic number.

It is an amenable number.

979952721 is a deficient number, since it is larger than the sum of its proper divisors (541654959).

979952721 is a wasteful number, since it uses less digits than its factorization.

979952721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22117.

The product of its digits is 714420, while the sum is 51.

The square root of 979952721 is about 31304.1965397612. The cubic root of 979952721 is about 993.2724147613.

The spelling of 979952721 in words is "nine hundred seventy-nine million, nine hundred fifty-two thousand, seven hundred twenty-one".