918861 has 8 divisors (see below), whose sum is σ = 1248480. Its totient is φ = 600912.

The previous prime is 918857. The next prime is 918877. The reversal of 918861 is 168819.

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

It is not a de Polignac number, because 918861 - 2² = 918857 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 918861.

It is not an unprimeable number, because it can be changed into a prime (918161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2731 + ... + 3048.

It is an arithmetic number, because the mean of its divisors is an integer number (156060).

2⁹¹⁸⁸⁶¹ is an apocalyptic number.

It is an amenable number.

918861 is a deficient number, since it is larger than the sum of its proper divisors (329619).

918861 is a wasteful number, since it uses less digits than its factorization.

918861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5835.

The product of its digits is 3456, while the sum is 33.

The square root of 918861 is about 958.5723759842. The cubic root of 918861 is about 97.2187291383.

The spelling of 918861 in words is "nine hundred eighteen thousand, eight hundred sixty-one".