716391 has 24 divisors (see below), whose sum is σ = 1156560. Its totient is φ = 438048.

The previous prime is 716389. The next prime is 716399. The reversal of 716391 is 193617.

It is not a de Polignac number, because 716391 - 2¹ = 716389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (716399) 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 23 ways as a sum of consecutive naturals, for example, 4485 + ... + 4641.

It is an arithmetic number, because the mean of its divisors is an integer number (48190).

2⁷¹⁶³⁹¹ is an apocalyptic number.

716391 is a deficient number, since it is larger than the sum of its proper divisors (440169).

716391 is a wasteful number, since it uses less digits than its factorization.

716391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192 (or 173 counting only the distinct ones).

The product of its digits is 1134, while the sum is 27.

The square root of 716391 is about 846.3988421542. The cubic root of 716391 is about 89.4780904101.

The spelling of 716391 in words is "seven hundred sixteen thousand, three hundred ninety-one".