679246139 has 16 divisors (see below), whose sum is σ = 817465824. Its totient is φ = 556089600.

The previous prime is 679246133. The next prime is 679246153. The reversal of 679246139 is 931642976.

It is a happy number.

It is not a de Polignac number, because 679246139 - 2⁴ = 679246123 is a prime.

It is a super-2 number, since 2×679246139² = 922750634692814642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 679246093 and 679246102.

It is not an unprimeable number, because it can be changed into a prime (679246133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52064 + ... + 63789.

It is an arithmetic number, because the mean of its divisors is an integer number (51091614).

Almost surely, 2^679246139 is an apocalyptic number.

679246139 is a deficient number, since it is larger than the sum of its proper divisors (138219685).

679246139 is a wasteful number, since it uses less digits than its factorization.

679246139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115918.

The product of its digits is 489888, while the sum is 47.

The square root of 679246139 is about 26062.3509875836. The cubic root of 679246139 is about 879.0408536430.

The spelling of 679246139 in words is "six hundred seventy-nine million, two hundred forty-six thousand, one hundred thirty-nine".