679836825 has 18 divisors (see below), whose sum is σ = 1217663694. Its totient is φ = 362579520.

The previous prime is 679836823. The next prime is 679836863. The reversal of 679836825 is 528638976.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 91240704 + 588596121 = 9552^2 + 24261^2 .

It is not a de Polignac number, because 679836825 - 2¹ = 679836823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679836823) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1510524 + ... + 1510973.

It is an arithmetic number, because the mean of its divisors is an integer number (67647983).

Almost surely, 2^679836825 is an apocalyptic number.

It is an amenable number.

679836825 is a deficient number, since it is larger than the sum of its proper divisors (537826869).

679836825 is a wasteful number, since it uses less digits than its factorization.

679836825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3021513 (or 3021505 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 679836825 is about 26073.6806952912. The cubic root of 679836825 is about 879.2955903065.

The spelling of 679836825 in words is "six hundred seventy-nine million, eight hundred thirty-six thousand, eight hundred twenty-five".