696316021 has 2 divisors, whose sum is σ = 696316022. Its totient is φ = 696316020.

The previous prime is 696316001. The next prime is 696316031. The reversal of 696316021 is 120613696.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 577200625 + 119115396 = 24025^2 + 10914^2 .

It is a cyclic number.

It is not a de Polignac number, because 696316021 - 2⁵ = 696315989 is a prime.

It is a super-2 number, since 2×696316021² = 969712002202544882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (696316001) 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, 348158010 + 348158011.

It is an arithmetic number, because the mean of its divisors is an integer number (348158011).

Almost surely, 2^696316021 is an apocalyptic number.

It is an amenable number.

696316021 is a deficient number, since it is larger than the sum of its proper divisors (1).

696316021 is an equidigital number, since it uses as much as digits as its factorization.

696316021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 696316021 is about 26387.8006093725. The cubic root of 696316021 is about 886.3436327886.

The spelling of 696316021 in words is "six hundred ninety-six million, three hundred sixteen thousand, twenty-one".