716691 has 4 divisors (see below), whose sum is σ = 955592. Its totient is φ = 477792.

The previous prime is 716687. The next prime is 716693. The reversal of 716691 is 196617.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 196617 = 3 ⋅65539.

It is not a de Polignac number, because 716691 - 2² = 716687 is a prime.

It is a D-number.

It is a Duffinian number.

716691 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (716693) 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 3 ways as a sum of consecutive naturals, for example, 119446 + ... + 119451.

It is an arithmetic number, because the mean of its divisors is an integer number (238898).

2⁷¹⁶⁶⁹¹ is an apocalyptic number.

716691 is a deficient number, since it is larger than the sum of its proper divisors (238901).

716691 is a wasteful number, since it uses less digits than its factorization.

716691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238900.

The product of its digits is 2268, while the sum is 30.

The square root of 716691 is about 846.5760450190. The cubic root of 716691 is about 89.4905787863.

The spelling of 716691 in words is "seven hundred sixteen thousand, six hundred ninety-one".