718642399 has 2 divisors, whose sum is σ = 718642400. Its totient is φ = 718642398.

The previous prime is 718642391. The next prime is 718642427. The reversal of 718642399 is 993246817.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 718642399 - 2³ = 718642391 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (718642391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359321199 + 359321200.

It is an arithmetic number, because the mean of its divisors is an integer number (359321200).

Almost surely, 2^718642399 is an apocalyptic number.

718642399 is a deficient number, since it is larger than the sum of its proper divisors (1).

718642399 is an equidigital number, since it uses as much as digits as its factorization.

718642399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 49.

The square root of 718642399 is about 26807.5063927998. The cubic root of 718642399 is about 895.7172652874.

The spelling of 718642399 in words is "seven hundred eighteen million, six hundred forty-two thousand, three hundred ninety-nine".