979405404521 has 8 divisors (see below), whose sum is σ = 979897681224. Its totient is φ = 978913237120.

The previous prime is 979405404407. The next prime is 979405404529. The reversal of 979405404521 is 125404504979.

It can be written as a sum of positive squares in 4 ways, for example, as 2114988121 + 977290416400 = 45989^2 + 988580^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 979405404521 - 2¹⁰ = 979405403497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 979405404521.

It is not an unprimeable number, because it can be changed into a prime (979405404529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22256981 + ... + 22300941.

It is an arithmetic number, because the mean of its divisors is an integer number (122487210153).

Almost surely, 2^979405404521 is an apocalyptic number.

It is an amenable number.

979405404521 is a deficient number, since it is larger than the sum of its proper divisors (492276703).

979405404521 is a wasteful number, since it uses less digits than its factorization.

979405404521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54651.

The product of its (nonzero) digits is 1814400, while the sum is 50.

The spelling of 979405404521 in words is "nine hundred seventy-nine billion, four hundred five million, four hundred four thousand, five hundred twenty-one".