679200606781 has 2 divisors, whose sum is σ = 679200606782. Its totient is φ = 679200606780.

The previous prime is 679200606761. The next prime is 679200606823. The reversal of 679200606781 is 187606002976.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 505193992900 + 174006613881 = 710770^2 + 417141^2 .

It is a cyclic number.

It is not a de Polignac number, because 679200606781 - 2³¹ = 677053123133 is a prime.

It is a super-2 number, since 2×679200606781² (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 (679200606701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339600303390 + 339600303391.

It is an arithmetic number, because the mean of its divisors is an integer number (339600303391).

Almost surely, 2^679200606781 is an apocalyptic number.

It is an amenable number.

679200606781 is a deficient number, since it is larger than the sum of its proper divisors (1).

679200606781 is an equidigital number, since it uses as much as digits as its factorization.

679200606781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The spelling of 679200606781 in words is "six hundred seventy-nine billion, two hundred million, six hundred six thousand, seven hundred eighty-one".