679497617 has 2 divisors, whose sum is σ = 679497618. Its totient is φ = 679497616.

The previous prime is 679497613. The next prime is 679497629. The reversal of 679497617 is 716794976.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 629809216 + 49688401 = 25096^2 + 7049^2 .

It is a cyclic number.

It is not a de Polignac number, because 679497617 - 2² = 679497613 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (679497613) 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, 339748808 + 339748809.

It is an arithmetic number, because the mean of its divisors is an integer number (339748809).

Almost surely, 2^679497617 is an apocalyptic number.

It is an amenable number.

679497617 is a deficient number, since it is larger than the sum of its proper divisors (1).

679497617 is an equidigital number, since it uses as much as digits as its factorization.

679497617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4000752, while the sum is 56.

The square root of 679497617 is about 26067.1750866871. The cubic root of 679497617 is about 879.1493229924.

The spelling of 679497617 in words is "six hundred seventy-nine million, four hundred ninety-seven thousand, six hundred seventeen".