887639 has 4 divisors (see below), whose sum is σ = 926256. Its totient is φ = 849024.

The previous prime is 887633. The next prime is 887641. The reversal of 887639 is 936788.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-887639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 887596 and 887605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (887633) 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, 19274 + ... + 19319.

It is an arithmetic number, because the mean of its divisors is an integer number (231564).

2⁸⁸⁷⁶³⁹ is an apocalyptic number.

887639 is a deficient number, since it is larger than the sum of its proper divisors (38617).

887639 is a wasteful number, since it uses less digits than its factorization.

887639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38616.

The product of its digits is 72576, while the sum is 41.

The square root of 887639 is about 942.1459547225. The cubic root of 887639 is about 96.1048839215.

The spelling of 887639 in words is "eight hundred eighty-seven thousand, six hundred thirty-nine".