690948593 has 2 divisors, whose sum is σ = 690948594. Its totient is φ = 690948592.

The previous prime is 690948571. The next prime is 690948613. The reversal of 690948593 is 395849096.

690948593 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., 439028209 + 251920384 = 20953^2 + 15872^2 .

It is a cyclic number.

It is not a de Polignac number, because 690948593 - 2⁶ = 690948529 is a prime.

It is not a weakly prime, because it can be changed into another prime (690948793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345474296 + 345474297.

It is an arithmetic number, because the mean of its divisors is an integer number (345474297).

Almost surely, 2^690948593 is an apocalyptic number.

It is an amenable number.

690948593 is a deficient number, since it is larger than the sum of its proper divisors (1).

690948593 is an equidigital number, since it uses as much as digits as its factorization.

690948593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2099520, while the sum is 53.

The square root of 690948593 is about 26285.9010307807. The cubic root of 690948593 is about 884.0603486062.

The spelling of 690948593 in words is "six hundred ninety million, nine hundred forty-eight thousand, five hundred ninety-three".