679179997 has 2 divisors, whose sum is σ = 679179998. Its totient is φ = 679179996.

The previous prime is 679179989. The next prime is 679180003. The reversal of 679179997 is 799971976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 375235641 + 303944356 = 19371^2 + 17434^2 .

It is a cyclic number.

It is not a de Polignac number, because 679179997 - 2³ = 679179989 is a prime.

It is a super-2 number, since 2×679179997² = 922570936649840018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (679179967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339589998 + 339589999.

It is an arithmetic number, because the mean of its divisors is an integer number (339589999).

Almost surely, 2^679179997 is an apocalyptic number.

It is an amenable number.

679179997 is a deficient number, since it is larger than the sum of its proper divisors (1).

679179997 is an equidigital number, since it uses as much as digits as its factorization.

679179997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13502538, while the sum is 64.

The square root of 679179997 is about 26061.0820381656. The cubic root of 679179997 is about 879.0123203401.

The spelling of 679179997 in words is "six hundred seventy-nine million, one hundred seventy-nine thousand, nine hundred ninety-seven".