979680645 has 12 divisors (see below), whose sum is σ = 1698113196. Its totient is φ = 522496320.

The previous prime is 979680629. The next prime is 979680661. The reversal of 979680645 is 546086979.

It is an interprime number because it is at equal distance from previous prime (979680629) and next prime (979680661).

It can be written as a sum of positive squares in 2 ways, for example, as 695218689 + 284461956 = 26367^2 + 16866^2 .

It is not a de Polignac number, because 979680645 - 2⁴ = 979680629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 979680591 and 979680600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10885296 + ... + 10885385.

It is an arithmetic number, because the mean of its divisors is an integer number (141509433).

Almost surely, 2^979680645 is an apocalyptic number.

It is an amenable number.

979680645 is a deficient number, since it is larger than the sum of its proper divisors (718432551).

979680645 is a wasteful number, since it uses less digits than its factorization.

979680645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21770692 (or 21770689 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The square root of 979680645 is about 31299.8505587487. The cubic root of 979680645 is about 993.1804815506.

The spelling of 979680645 in words is "nine hundred seventy-nine million, six hundred eighty thousand, six hundred forty-five".