679581697 has 2 divisors, whose sum is σ = 679581698. Its totient is φ = 679581696.

The previous prime is 679581689. The next prime is 679581733. The reversal of 679581697 is 796185976.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 390615696 + 288966001 = 19764^2 + 16999^2 .

It is a cyclic number.

It is not a de Polignac number, because 679581697 - 2³ = 679581689 is a prime.

It is not a weakly prime, because it can be changed into another prime (679591697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339790848 + 339790849.

It is an arithmetic number, because the mean of its divisors is an integer number (339790849).

Almost surely, 2^679581697 is an apocalyptic number.

It is an amenable number.

679581697 is a deficient number, since it is larger than the sum of its proper divisors (1).

679581697 is an equidigital number, since it uses as much as digits as its factorization.

679581697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5715360, while the sum is 58.

The square root of 679581697 is about 26068.7877930678. The cubic root of 679581697 is about 879.1855830295.

The spelling of 679581697 in words is "six hundred seventy-nine million, five hundred eighty-one thousand, six hundred ninety-seven".