679745547277 has 2 divisors, whose sum is σ = 679745547278. Its totient is φ = 679745547276.

The previous prime is 679745547259. The next prime is 679745547361. The reversal of 679745547277 is 772745547976.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 442711913956 + 237033633321 = 665366^2 + 486861^2 .

It is a cyclic number.

It is not a de Polignac number, because 679745547277 - 2⁷ = 679745547149 is a prime.

It is a super-2 number, since 2×679745547277² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (679745947277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339872773638 + 339872773639.

It is an arithmetic number, because the mean of its divisors is an integer number (339872773639).

Almost surely, 2^679745547277 is an apocalyptic number.

It is an amenable number.

679745547277 is a deficient number, since it is larger than the sum of its proper divisors (1).

679745547277 is an equidigital number, since it uses as much as digits as its factorization.

679745547277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 726062400, while the sum is 70.

The spelling of 679745547277 in words is "six hundred seventy-nine billion, seven hundred forty-five million, five hundred forty-seven thousand, two hundred seventy-seven".