718331513 has 2 divisors, whose sum is σ = 718331514. Its totient is φ = 718331512.

The previous prime is 718331507. The next prime is 718331531. The reversal of 718331513 is 315133817.

Together with next prime (718331531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 562780729 + 155550784 = 23723^2 + 12472^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-718331513 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 718331513.

It is not a weakly prime, because it can be changed into another prime (718331543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359165756 + 359165757.

It is an arithmetic number, because the mean of its divisors is an integer number (359165757).

Almost surely, 2^718331513 is an apocalyptic number.

It is an amenable number.

718331513 is a deficient number, since it is larger than the sum of its proper divisors (1).

718331513 is an equidigital number, since it uses as much as digits as its factorization.

718331513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 32.

The square root of 718331513 is about 26801.7072777090. The cubic root of 718331513 is about 895.5880836885.

The spelling of 718331513 in words is "seven hundred eighteen million, three hundred thirty-one thousand, five hundred thirteen".