679987177 has 2 divisors, whose sum is σ = 679987178. Its totient is φ = 679987176.

The previous prime is 679987153. The next prime is 679987261. The reversal of 679987177 is 771789976.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 674492841 + 5494336 = 25971^2 + 2344^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-679987177 is a prime.

It is not a weakly prime, because it can be changed into another prime (679987127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339993588 + 339993589.

It is an arithmetic number, because the mean of its divisors is an integer number (339993589).

Almost surely, 2^679987177 is an apocalyptic number.

It is an amenable number.

679987177 is a deficient number, since it is larger than the sum of its proper divisors (1).

679987177 is an equidigital number, since it uses as much as digits as its factorization.

679987177 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9335088, while the sum is 61.

The square root of 679987177 is about 26076.5637498502. The cubic root of 679987177 is about 879.3604068923.

The spelling of 679987177 in words is "six hundred seventy-nine million, nine hundred eighty-seven thousand, one hundred seventy-seven".