39889 has 4 divisors (see below), whose sum is σ = 40356. Its totient is φ = 39424.

The previous prime is 39887. The next prime is 39901. The reversal of 39889 is 98893.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6400 + 33489 = 80^2 + 183^2 .

It is a cyclic number.

It is not a de Polignac number, because 39889 - 2¹ = 39887 is a prime.

It is a super-2 number, since 2×39889² = 3182264642, which contains 22 as substring.

It is a Duffinian number.

39889 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39883) 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, 64 + ... + 289.

It is an arithmetic number, because the mean of its divisors is an integer number (10089).

2³⁹⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

39889 is a deficient number, since it is larger than the sum of its proper divisors (467).

39889 is a wasteful number, since it uses less digits than its factorization.

39889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466.

The product of its digits is 15552, while the sum is 37.

The square root of 39889 is about 199.7223072168. The cubic root of 39889 is about 34.1678550714.

The spelling of 39889 in words is "thirty-nine thousand, eight hundred eighty-nine".