715663813 has 2 divisors, whose sum is σ = 715663814. Its totient is φ = 715663812.

The previous prime is 715663801. The next prime is 715663831. The reversal of 715663813 is 318366517.

It is a happy number.

Together with next prime (715663831) 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., 526381249 + 189282564 = 22943^2 + 13758^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-715663813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (715663843) 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, 357831906 + 357831907.

It is an arithmetic number, because the mean of its divisors is an integer number (357831907).

Almost surely, 2^715663813 is an apocalyptic number.

It is an amenable number.

715663813 is a deficient number, since it is larger than the sum of its proper divisors (1).

715663813 is an equidigital number, since it uses as much as digits as its factorization.

715663813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 40.

The square root of 715663813 is about 26751.8936339094. The cubic root of 715663813 is about 894.4780465250.

The spelling of 715663813 in words is "seven hundred fifteen million, six hundred sixty-three thousand, eight hundred thirteen".