690658963997 has 2 divisors, whose sum is σ = 690658963998. Its totient is φ = 690658963996.

The previous prime is 690658963987. The next prime is 690658964033. The reversal of 690658963997 is 799369856096.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 679678229476 + 10980734521 = 824426^2 + 104789^2 .

It is a cyclic number.

It is not a de Polignac number, because 690658963997 - 2⁶ = 690658963933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690658963987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345329481998 + 345329481999.

It is an arithmetic number, because the mean of its divisors is an integer number (345329481999).

Almost surely, 2^690658963997 is an apocalyptic number.

It is an amenable number.

690658963997 is a deficient number, since it is larger than the sum of its proper divisors (1).

690658963997 is an equidigital number, since it uses as much as digits as its factorization.

690658963997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1190427840, while the sum is 77.

The spelling of 690658963997 in words is "six hundred ninety billion, six hundred fifty-eight million, nine hundred sixty-three thousand, nine hundred ninety-seven".