679006836 has 18 divisors (see below), whose sum is σ = 1716378482. Its totient is φ = 226335600.

The previous prime is 679006831. The next prime is 679006837. The reversal of 679006836 is 638600976.

It can be written as a sum of positive squares in only one way, i.e., 526977936 + 152028900 = 22956^2 + 12330^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×679006836² = 922100566669461792, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 679006791 and 679006800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679006831) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9430615 + ... + 9430686.

Almost surely, 2^679006836 is an apocalyptic number.

It is an amenable number.

679006836 is an abundant number, since it is smaller than the sum of its proper divisors (1037371646).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

679006836 is a wasteful number, since it uses less digits than its factorization.

679006836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18861311 (or 18861306 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 679006836 is about 26057.7596120618. The cubic root of 679006836 is about 878.9376108421.

The spelling of 679006836 in words is "six hundred seventy-nine million, six thousand, eight hundred thirty-six".