690636543913 has 2 divisors, whose sum is σ = 690636543914. Its totient is φ = 690636543912.

The previous prime is 690636543887. The next prime is 690636543941. The reversal of 690636543913 is 319345636096.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 688363924329 + 2272619584 = 829677^2 + 47672^2 .

It is a cyclic number.

It is not a de Polignac number, because 690636543913 - 2¹⁷ = 690636412841 is a prime.

It is not a weakly prime, because it can be changed into another prime (690636543013) 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, 345318271956 + 345318271957.

It is an arithmetic number, because the mean of its divisors is an integer number (345318271957).

Almost surely, 2^690636543913 is an apocalyptic number.

It is an amenable number.

690636543913 is a deficient number, since it is larger than the sum of its proper divisors (1).

690636543913 is an equidigital number, since it uses as much as digits as its factorization.

690636543913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9447840, while the sum is 55.

The spelling of 690636543913 in words is "six hundred ninety billion, six hundred thirty-six million, five hundred forty-three thousand, nine hundred thirteen".