679835917 has 2 divisors, whose sum is σ = 679835918. Its totient is φ = 679835916.

The previous prime is 679835879. The next prime is 679835927. The reversal of 679835917 is 719538976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 672157476 + 7678441 = 25926^2 + 2771^2 .

It is a cyclic number.

It is not a de Polignac number, because 679835917 - 2¹⁹ = 679311629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (679835927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339917958 + 339917959.

It is an arithmetic number, because the mean of its divisors is an integer number (339917959).

Almost surely, 2^679835917 is an apocalyptic number.

It is an amenable number.

679835917 is a deficient number, since it is larger than the sum of its proper divisors (1).

679835917 is an equidigital number, since it uses as much as digits as its factorization.

679835917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2857680, while the sum is 55.

The square root of 679835917 is about 26073.6632830909. The cubic root of 679835917 is about 879.2951988396.

The spelling of 679835917 in words is "six hundred seventy-nine million, eight hundred thirty-five thousand, nine hundred seventeen".