716725591 has 4 divisors (see below), whose sum is σ = 733393672. Its totient is φ = 700057512.

The previous prime is 716725553. The next prime is 716725601. The reversal of 716725591 is 195527617.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 195527617 = 101 ⋅1935917.

It is a cyclic number.

It is not a de Polignac number, because 716725591 - 2⁷ = 716725463 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 16668037 = 716725591 / (7 + 1 + 6 + 7 + 2 + 5 + 5 + 9 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (716725511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8333976 + ... + 8334061.

It is an arithmetic number, because the mean of its divisors is an integer number (183348418).

Almost surely, 2^716725591 is an apocalyptic number.

716725591 is a deficient number, since it is larger than the sum of its proper divisors (16668081).

716725591 is a wasteful number, since it uses less digits than its factorization.

716725591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16668080.

The product of its digits is 132300, while the sum is 43.

The square root of 716725591 is about 26771.7311916880. The cubic root of 716725591 is about 894.9201851361.

The spelling of 716725591 in words is "seven hundred sixteen million, seven hundred twenty-five thousand, five hundred ninety-one".