812979 has 12 divisors (see below), whose sum is σ = 1187056. Its totient is φ = 536112.

The previous prime is 812969. The next prime is 813013. The reversal of 812979 is 979218.

It is a happy number.

It is not a de Polignac number, because 812979 - 2⁴ = 812963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (812939) 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, 489 + ... + 1365.

2⁸¹²⁹⁷⁹ is an apocalyptic number.

812979 is a deficient number, since it is larger than the sum of its proper divisors (374077).

812979 is a wasteful number, since it uses less digits than its factorization.

812979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986 (or 983 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 812979 is about 901.6534811112. The cubic root of 812979 is about 93.3311124755.

The spelling of 812979 in words is "eight hundred twelve thousand, nine hundred seventy-nine".