696816709 has 2 divisors, whose sum is σ = 696816710. Its totient is φ = 696816708.

The previous prime is 696816629. The next prime is 696816721. The reversal of 696816709 is 907618696.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 474150625 + 222666084 = 21775^2 + 14922^2 .

It is a cyclic number.

It is not a de Polignac number, because 696816709 - 2⁷ = 696816581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (696876709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348408354 + 348408355.

It is an arithmetic number, because the mean of its divisors is an integer number (348408355).

Almost surely, 2^696816709 is an apocalyptic number.

It is an amenable number.

696816709 is a deficient number, since it is larger than the sum of its proper divisors (1).

696816709 is an equidigital number, since it uses as much as digits as its factorization.

696816709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 979776, while the sum is 52.

The square root of 696816709 is about 26397.2860158009. The cubic root of 696816709 is about 886.5560245199.

The spelling of 696816709 in words is "six hundred ninety-six million, eight hundred sixteen thousand, seven hundred nine".