697357091 has 2 divisors, whose sum is σ = 697357092. Its totient is φ = 697357090.

The previous prime is 697357081. The next prime is 697357159. The reversal of 697357091 is 190753796.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 697357091 - 2⁶ = 697357027 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (697357021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348678545 + 348678546.

It is an arithmetic number, because the mean of its divisors is an integer number (348678546).

Almost surely, 2^697357091 is an apocalyptic number.

697357091 is a deficient number, since it is larger than the sum of its proper divisors (1).

697357091 is an equidigital number, since it uses as much as digits as its factorization.

697357091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 357210, while the sum is 47.

The square root of 697357091 is about 26407.5195919647. The cubic root of 697357091 is about 886.7851403083.

The spelling of 697357091 in words is "six hundred ninety-seven million, three hundred fifty-seven thousand, ninety-one".