697156813 has 2 divisors, whose sum is σ = 697156814. Its totient is φ = 697156812.

The previous prime is 697156793. The next prime is 697156829. The reversal of 697156813 is 318651796.

It is a happy number.

697156813 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., 692058249 + 5098564 = 26307^2 + 2258^2 .

It is a cyclic number.

It is not a de Polignac number, because 697156813 - 2⁹ = 697156301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (697154813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348578406 + 348578407.

It is an arithmetic number, because the mean of its divisors is an integer number (348578407).

Almost surely, 2^697156813 is an apocalyptic number.

It is an amenable number.

697156813 is a deficient number, since it is larger than the sum of its proper divisors (1).

697156813 is an equidigital number, since it uses as much as digits as its factorization.

697156813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 46.

The square root of 697156813 is about 26403.7272558251. The cubic root of 697156813 is about 886.7002385358.

The spelling of 697156813 in words is "six hundred ninety-seven million, one hundred fifty-six thousand, eight hundred thirteen".