679740913 has 2 divisors, whose sum is σ = 679740914. Its totient is φ = 679740912.

The previous prime is 679740883. The next prime is 679740917. The reversal of 679740913 is 319047976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 670395664 + 9345249 = 25892^2 + 3057^2 .

It is a cyclic number.

It is not a de Polignac number, because 679740913 - 2²¹ = 677643761 is a prime.

It is not a weakly prime, because it can be changed into another prime (679740917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339870456 + 339870457.

It is an arithmetic number, because the mean of its divisors is an integer number (339870457).

Almost surely, 2^679740913 is an apocalyptic number.

It is an amenable number.

679740913 is a deficient number, since it is larger than the sum of its proper divisors (1).

679740913 is an equidigital number, since it uses as much as digits as its factorization.

679740913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 46.

The square root of 679740913 is about 26071.8413810763. The cubic root of 679740913 is about 879.2542377535.

The spelling of 679740913 in words is "six hundred seventy-nine million, seven hundred forty thousand, nine hundred thirteen".