979478681 has 8 divisors (see below), whose sum is σ = 1042363080. Its totient is φ = 917179648.

The previous prime is 979478677. The next prime is 979478693. The reversal of 979478681 is 186874979.

It can be written as a sum of positive squares in 4 ways, for example, as 817960000 + 161518681 = 28600^2 + 12709^2 .

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

It is not a de Polignac number, because 979478681 - 2² = 979478677 is a prime.

It is a super-2 number, since 2×979478681² = 1918756973066999522, which contains 22 as substring.

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 979478681.

It is not an unprimeable number, because it can be changed into a prime (979478611) 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, 142886 + ... + 149583.

It is an arithmetic number, because the mean of its divisors is an integer number (130295385).

Almost surely, 2^979478681 is an apocalyptic number.

It is an amenable number.

979478681 is a deficient number, since it is larger than the sum of its proper divisors (62884399).

979478681 is a wasteful number, since it uses less digits than its factorization.

979478681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292683.

The product of its digits is 6096384, while the sum is 59.

The square root of 979478681 is about 31296.6241150703. The cubic root of 979478681 is about 993.1122278500.

The spelling of 979478681 in words is "nine hundred seventy-nine million, four hundred seventy-eight thousand, six hundred eighty-one".