716557 has 4 divisors (see below), whose sum is σ = 734076. Its totient is φ = 699040.

The previous prime is 716549. The next prime is 716563. The reversal of 716557 is 755617.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45796 + 670761 = 214^2 + 819^2 .

It is a cyclic number.

It is not a de Polignac number, because 716557 - 2³ = 716549 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (716257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8698 + ... + 8779.

It is an arithmetic number, because the mean of its divisors is an integer number (183519).

2⁷¹⁶⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

716557 is a deficient number, since it is larger than the sum of its proper divisors (17519).

716557 is a wasteful number, since it uses less digits than its factorization.

716557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17518.

The product of its digits is 7350, while the sum is 31.

The square root of 716557 is about 846.4968989902. The cubic root of 716557 is about 89.4850010757.

Subtracting 716557 from its reverse (755617), we obtain a triangular number (39060 = T₂₇₉).

The spelling of 716557 in words is "seven hundred sixteen thousand, five hundred fifty-seven".