939987 has 24 divisors (see below), whose sum is σ = 1497600. Its totient is φ = 565488.

The previous prime is 939973. The next prime is 939989. The reversal of 939987 is 789939.

It is a happy number.

It is not a de Polignac number, because 939987 - 2⁴ = 939971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (939989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3814 + ... + 4052.

It is an arithmetic number, because the mean of its divisors is an integer number (62400).

2⁹³⁹⁹⁸⁷ is an apocalyptic number.

939987 is a deficient number, since it is larger than the sum of its proper divisors (557613).

939987 is a wasteful number, since it uses less digits than its factorization.

939987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287 (or 284 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 939987 is about 969.5292672220. The cubic root of 939987 is about 97.9581592872.

The spelling of 939987 in words is "nine hundred thirty-nine thousand, nine hundred eighty-seven".