979474921 has 4 divisors (see below), whose sum is σ = 979790292. Its totient is φ = 979159552.

The previous prime is 979474889. The next prime is 979474961. The reversal of 979474921 is 129474979.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 825987600 + 153487321 = 28740^2 + 12389^2 .

It is a cyclic number.

It is not a de Polignac number, because 979474921 - 2⁵ = 979474889 is a prime.

It is a super-2 number, since 2×979474921² = 1918742241735912482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (979474961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152980 + ... + 159253.

It is an arithmetic number, because the mean of its divisors is an integer number (244947573).

Almost surely, 2^979474921 is an apocalyptic number.

It is an amenable number.

979474921 is a deficient number, since it is larger than the sum of its proper divisors (315371).

979474921 is a wasteful number, since it uses less digits than its factorization.

979474921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315370.

The product of its digits is 1143072, while the sum is 52.

The square root of 979474921 is about 31296.5640446360. The cubic root of 979474921 is about 993.1109570697.

The spelling of 979474921 in words is "nine hundred seventy-nine million, four hundred seventy-four thousand, nine hundred twenty-one".