718491 has 8 divisors (see below), whose sum is σ = 965440. Its totient is φ = 475272.

The previous prime is 718463. The next prime is 718493. The reversal of 718491 is 194817.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 718491 - 2⁶ = 718427 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 718491.

It is not an unprimeable number, because it can be changed into a prime (718493) 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 7 ways as a sum of consecutive naturals, for example, 445 + ... + 1278.

It is an arithmetic number, because the mean of its divisors is an integer number (120680).

2⁷¹⁸⁴⁹¹ is an apocalyptic number.

718491 is a deficient number, since it is larger than the sum of its proper divisors (246949).

718491 is a wasteful number, since it uses less digits than its factorization.

718491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1865.

The product of its digits is 2016, while the sum is 30.

The square root of 718491 is about 847.6384842608. The cubic root of 718491 is about 89.5654359535.

The spelling of 718491 in words is "seven hundred eighteen thousand, four hundred ninety-one".