691352113 has 2 divisors, whose sum is σ = 691352114. Its totient is φ = 691352112.

The previous prime is 691352099. The next prime is 691352117. The reversal of 691352113 is 311253196.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 691006369 + 345744 = 26287^2 + 588^2 .

It is a cyclic number.

It is not a de Polignac number, because 691352113 - 2⁹ = 691351601 is a prime.

It is not a weakly prime, because it can be changed into another prime (691352117) 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, 345676056 + 345676057.

It is an arithmetic number, because the mean of its divisors is an integer number (345676057).

Almost surely, 2^691352113 is an apocalyptic number.

It is an amenable number.

691352113 is a deficient number, since it is larger than the sum of its proper divisors (1).

691352113 is an equidigital number, since it uses as much as digits as its factorization.

691352113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 31.

The square root of 691352113 is about 26293.5755080970. The cubic root of 691352113 is about 884.2324147640.

The spelling of 691352113 in words is "six hundred ninety-one million, three hundred fifty-two thousand, one hundred thirteen".