718605 has 16 divisors (see below), whose sum is σ = 1277760. Its totient is φ = 383184.

The previous prime is 718603. The next prime is 718621. The reversal of 718605 is 506817.

It is not a de Polignac number, because 718605 - 2¹ = 718603 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

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 (718603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2527 + ... + 2796.

It is an arithmetic number, because the mean of its divisors is an integer number (79860).

2⁷¹⁸⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

718605 is a deficient number, since it is larger than the sum of its proper divisors (559155).

718605 is a wasteful number, since it uses less digits than its factorization.

718605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5337 (or 5331 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 718605 is about 847.7057272427. The cubic root of 718605 is about 89.5701726956.

The spelling of 718605 in words is "seven hundred eighteen thousand, six hundred five".