718861 has 12 divisors (see below), whose sum is σ = 852796. Its totient is φ = 601920.

The previous prime is 718847. The next prime is 718871. The reversal of 718861 is 168817.

718861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 366025 + 352836 = 605^2 + 594^2 .

It is not a de Polignac number, because 718861 - 2⁹ = 718349 is a prime.

It is a super-2 number, since 2×718861² = 1033522274642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (718801) 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, 1345 + ... + 1801.

2⁷¹⁸⁸⁶¹ is an apocalyptic number.

It is an amenable number.

718861 is a deficient number, since it is larger than the sum of its proper divisors (133935).

718861 is a wasteful number, since it uses less digits than its factorization.

718861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492 (or 481 counting only the distinct ones).

The product of its digits is 2688, while the sum is 31.

The square root of 718861 is about 847.8567095919. The cubic root of 718861 is about 89.5808077649.

The spelling of 718861 in words is "seven hundred eighteen thousand, eight hundred sixty-one".