679591697 has 2 divisors, whose sum is σ = 679591698. Its totient is φ = 679591696.

The previous prime is 679591669. The next prime is 679591723. The reversal of 679591697 is 796195976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 427290241 + 252301456 = 20671^2 + 15884^2 .

It is a cyclic number.

It is not a de Polignac number, because 679591697 - 2¹⁰ = 679590673 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (679591607) 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, 339795848 + 339795849.

It is an arithmetic number, because the mean of its divisors is an integer number (339795849).

Almost surely, 2^679591697 is an apocalyptic number.

It is an amenable number.

679591697 is a deficient number, since it is larger than the sum of its proper divisors (1).

679591697 is an equidigital number, since it uses as much as digits as its factorization.

679591697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6429780, while the sum is 59.

The square root of 679591697 is about 26068.9795926116. The cubic root of 679591697 is about 879.1898953944.

The spelling of 679591697 in words is "six hundred seventy-nine million, five hundred ninety-one thousand, six hundred ninety-seven".