979944778 has 8 divisors (see below), whose sum is σ = 1509644772. Its totient is φ = 476729856.

The previous prime is 979944767. The next prime is 979944799. The reversal of 979944778 is 877449979.

It can be written as a sum of positive squares in 2 ways, for example, as 977375169 + 2569609 = 31263^2 + 1603^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6621175 + ... + 6621322.

Almost surely, 2^979944778 is an apocalyptic number.

979944778 is a deficient number, since it is larger than the sum of its proper divisors (529699994).

979944778 is a wasteful number, since it uses less digits than its factorization.

979944778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13242536.

The product of its digits is 32006016, while the sum is 64.

The square root of 979944778 is about 31304.0696715299. The cubic root of 979944778 is about 993.2697310998.

The spelling of 979944778 in words is "nine hundred seventy-nine million, nine hundred forty-four thousand, seven hundred seventy-eight".