715401997 has 2 divisors, whose sum is σ = 715401998. Its totient is φ = 715401996.

The previous prime is 715401991. The next prime is 715402001. The reversal of 715401997 is 799104517.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 394777161 + 320624836 = 19869^2 + 17906^2 .

It is an emirp because it is prime and its reverse (799104517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 715401997 - 2¹⁵ = 715369229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (715401991) 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, 357700998 + 357700999.

It is an arithmetic number, because the mean of its divisors is an integer number (357700999).

Almost surely, 2^715401997 is an apocalyptic number.

It is an amenable number.

715401997 is a deficient number, since it is larger than the sum of its proper divisors (1).

715401997 is an equidigital number, since it uses as much as digits as its factorization.

715401997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 79380, while the sum is 43.

The square root of 715401997 is about 26746.9997756758. Note that the first 3 decimals coincide. The cubic root of 715401997 is about 894.3689556250.

It can be divided in two parts, 71540 and 1997, that added together give a palindrome (73537).

The spelling of 715401997 in words is "seven hundred fifteen million, four hundred one thousand, nine hundred ninety-seven".