690338633 has 2 divisors, whose sum is σ = 690338634. Its totient is φ = 690338632.

The previous prime is 690338581. The next prime is 690338653. The reversal of 690338633 is 336833096.

690338633 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 630863689 + 59474944 = 25117^2 + 7712^2 .

It is a cyclic number.

It is not a de Polignac number, because 690338633 - 2²⁶ = 623229769 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (690338653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345169316 + 345169317.

It is an arithmetic number, because the mean of its divisors is an integer number (345169317).

Almost surely, 2^690338633 is an apocalyptic number.

It is an amenable number.

690338633 is a deficient number, since it is larger than the sum of its proper divisors (1).

690338633 is an equidigital number, since it uses as much as digits as its factorization.

690338633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 41.

The square root of 690338633 is about 26274.2960514644. The cubic root of 690338633 is about 883.8001265425.

The spelling of 690338633 in words is "six hundred ninety million, three hundred thirty-eight thousand, six hundred thirty-three".