716819391 has 12 divisors (see below), whose sum is σ = 1035983520. Its totient is φ = 477612960.

The previous prime is 716819347. The next prime is 716819393. The reversal of 716819391 is 193918617.

It is not a de Polignac number, because 716819391 - 2¹⁰ = 716818367 is a prime.

It is a super-2 number, since 2×716819391² = 1027660078627221762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (716819393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4446 + ... + 38123.

It is an arithmetic number, because the mean of its divisors is an integer number (86331960).

Almost surely, 2^716819391 is an apocalyptic number.

716819391 is a deficient number, since it is larger than the sum of its proper divisors (319164129).

716819391 is a wasteful number, since it uses less digits than its factorization.

716819391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44446 (or 44443 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 716819391 is about 26773.4829822345. The cubic root of 716819391 is about 894.9592237178.

The spelling of 716819391 in words is "seven hundred sixteen million, eight hundred nineteen thousand, three hundred ninety-one".