979945871 has 4 divisors (see below), whose sum is σ = 985610472. Its totient is φ = 974281272.

The previous prime is 979945853. The next prime is 979945903. The reversal of 979945871 is 178549979.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 178549979 = 257 ⋅694747.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-979945871 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 979945871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (979945271) 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, 2832041 + ... + 2832386.

It is an arithmetic number, because the mean of its divisors is an integer number (246402618).

Almost surely, 2^979945871 is an apocalyptic number.

979945871 is a deficient number, since it is larger than the sum of its proper divisors (5664601).

979945871 is a wasteful number, since it uses less digits than its factorization.

979945871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5664600.

The product of its digits is 5715360, while the sum is 59.

The square root of 979945871 is about 31304.0871293191. The cubic root of 979945871 is about 993.2701003871.

The spelling of 979945871 in words is "nine hundred seventy-nine million, nine hundred forty-five thousand, eight hundred seventy-one".