715691 has 12 divisors (see below), whose sum is σ = 794352. Its totient is φ = 643104.

The previous prime is 715681. The next prime is 715699. The reversal of 715691 is 196517.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-715691 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 715691.

It is not an unprimeable number, because it can be changed into a prime (715699) 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 in 11 ways as a sum of consecutive naturals, for example, 19325 + ... + 19361.

It is an arithmetic number, because the mean of its divisors is an integer number (66196).

2⁷¹⁵⁶⁹¹ is an apocalyptic number.

715691 is a deficient number, since it is larger than the sum of its proper divisors (78661).

715691 is a wasteful number, since it uses less digits than its factorization.

715691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 89 counting only the distinct ones).

The product of its digits is 1890, while the sum is 29.

The square root of 715691 is about 845.9852244573. The cubic root of 715691 is about 89.4489373010.

The spelling of 715691 in words is "seven hundred fifteen thousand, six hundred ninety-one".