939899 has 4 divisors (see below), whose sum is σ = 942480. Its totient is φ = 937320.

The previous prime is 939881. The next prime is 939901. The reversal of 939899 is 998939.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 998939 = 181 ⋅5519.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-939899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (939839) 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, 632 + ... + 1509.

It is an arithmetic number, because the mean of its divisors is an integer number (235620).

2⁹³⁹⁸⁹⁹ is an apocalyptic number.

939899 is a deficient number, since it is larger than the sum of its proper divisors (2581).

939899 is a wasteful number, since it uses less digits than its factorization.

939899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2580.

The product of its digits is 157464, while the sum is 47.

The square root of 939899 is about 969.4838833111. The cubic root of 939899 is about 97.9551022992.

The spelling of 939899 in words is "nine hundred thirty-nine thousand, eight hundred ninety-nine".