716591251 has 4 divisors (see below), whose sum is σ = 754306600. Its totient is φ = 678875904.

The previous prime is 716591231. The next prime is 716591269. The reversal of 716591251 is 152195617.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-716591251 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 716591251.

It is not an unprimeable number, because it can be changed into a prime (716591201) 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, 18857646 + ... + 18857683.

It is an arithmetic number, because the mean of its divisors is an integer number (188576650).

Almost surely, 2^716591251 is an apocalyptic number.

716591251 is a deficient number, since it is larger than the sum of its proper divisors (37715349).

716591251 is a wasteful number, since it uses less digits than its factorization.

716591251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37715348.

The product of its digits is 18900, while the sum is 37.

The square root of 716591251 is about 26769.2220843266. Note that the first 3 decimals coincide. The cubic root of 716591251 is about 894.8642682964.

The spelling of 716591251 in words is "seven hundred sixteen million, five hundred ninety-one thousand, two hundred fifty-one".