918887 has 4 divisors (see below), whose sum is σ = 921000. Its totient is φ = 916776.

The previous prime is 918877. The next prime is 918889. The reversal of 918887 is 788819.

918887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 918887 - 2⁶ = 918823 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137 + ... + 1362.

It is an arithmetic number, because the mean of its divisors is an integer number (230250).

2⁹¹⁸⁸⁸⁷ is an apocalyptic number.

918887 is a deficient number, since it is larger than the sum of its proper divisors (2113).

918887 is a wasteful number, since it uses less digits than its factorization.

918887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2112.

The product of its digits is 32256, while the sum is 41.

The square root of 918887 is about 958.5859377229. The cubic root of 918887 is about 97.2196460935.

The spelling of 918887 in words is "nine hundred eighteen thousand, eight hundred eighty-seven".