690658769 has 2 divisors, whose sum is σ = 690658770. Its totient is φ = 690658768.

The previous prime is 690658763. The next prime is 690658807. The reversal of 690658769 is 967856096.

690658769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 506025025 + 184633744 = 22495^2 + 13588^2 .

It is a cyclic number.

It is not a de Polignac number, because 690658769 - 2²⁰ = 689610193 is a prime.

It is a super-2 number, since 2×690658769² = 954019070393190722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (690658763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345329384 + 345329385.

It is an arithmetic number, because the mean of its divisors is an integer number (345329385).

Almost surely, 2^690658769 is an apocalyptic number.

It is an amenable number.

690658769 is a deficient number, since it is larger than the sum of its proper divisors (1).

690658769 is an equidigital number, since it uses as much as digits as its factorization.

690658769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4898880, while the sum is 56.

The square root of 690658769 is about 26280.3875351944. The cubic root of 690658769 is about 883.9367225545.

The spelling of 690658769 in words is "six hundred ninety million, six hundred fifty-eight thousand, seven hundred sixty-nine".