718136609 has 2 divisors, whose sum is σ = 718136610. Its totient is φ = 718136608.

The previous prime is 718136603. The next prime is 718136611. The reversal of 718136609 is 906631817.

718136609 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., 667085584 + 51051025 = 25828^2 + 7145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-718136609 is a prime.

Together with 718136611, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (718136603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359068304 + 359068305.

It is an arithmetic number, because the mean of its divisors is an integer number (359068305).

Almost surely, 2^718136609 is an apocalyptic number.

It is an amenable number.

718136609 is a deficient number, since it is larger than the sum of its proper divisors (1).

718136609 is an equidigital number, since it uses as much as digits as its factorization.

718136609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 718136609 is about 26798.0709940100. The cubic root of 718136609 is about 895.5070767596.

The spelling of 718136609 in words is "seven hundred eighteen million, one hundred thirty-six thousand, six hundred nine".