816896979 has 12 divisors (see below), whose sum is σ = 1183080600. Its totient is φ = 543158784.

The previous prime is 816896953. The next prime is 816896987. The reversal of 816896979 is 979698618.

It is not a de Polignac number, because 816896979 - 2⁵ = 816896947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (816896909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116334 + ... + 123155.

It is an arithmetic number, because the mean of its divisors is an integer number (98590050).

Almost surely, 2^816896979 is an apocalyptic number.

816896979 is a deficient number, since it is larger than the sum of its proper divisors (366183621).

816896979 is a wasteful number, since it uses less digits than its factorization.

816896979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239874 (or 239871 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 63.

The square root of 816896979 is about 28581.4096748218. The cubic root of 816896979 is about 934.8080206758.

The spelling of 816896979 in words is "eight hundred sixteen million, eight hundred ninety-six thousand, nine hundred seventy-nine".