696080009 has 2 divisors, whose sum is σ = 696080010. Its totient is φ = 696080008.

The previous prime is 696079999. The next prime is 696080017. The reversal of 696080009 is 900080696.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 470239225 + 225840784 = 21685^2 + 15028^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-696080009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (696080909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348040004 + 348040005.

It is an arithmetic number, because the mean of its divisors is an integer number (348040005).

Almost surely, 2^696080009 is an apocalyptic number.

It is an amenable number.

696080009 is a deficient number, since it is larger than the sum of its proper divisors (1).

696080009 is an equidigital number, since it uses as much as digits as its factorization.

696080009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 696080009 is about 26383.3282396289. The cubic root of 696080009 is about 886.2434812454.

The spelling of 696080009 in words is "six hundred ninety-six million, eighty thousand, nine".