697856399 has 2 divisors, whose sum is σ = 697856400. Its totient is φ = 697856398.

The previous prime is 697856323. The next prime is 697856429. The reversal of 697856399 is 993658796.

697856399 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 is a cyclic number.

It is not a de Polignac number, because 697856399 - 2⁸ = 697856143 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (697846399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348928199 + 348928200.

It is an arithmetic number, because the mean of its divisors is an integer number (348928200).

Almost surely, 2^697856399 is an apocalyptic number.

697856399 is a deficient number, since it is larger than the sum of its proper divisors (1).

697856399 is an equidigital number, since it uses as much as digits as its factorization.

697856399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22044960, while the sum is 62.

The square root of 697856399 is about 26416.9717984481. The cubic root of 697856399 is about 886.9967360058.

The spelling of 697856399 in words is "six hundred ninety-seven million, eight hundred fifty-six thousand, three hundred ninety-nine".