393899 has 4 divisors (see below), whose sum is σ = 429720. Its totient is φ = 358080.

The previous prime is 393871. The next prime is 393901. The reversal of 393899 is 998393.

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-393899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (393859) 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, 17894 + ... + 17915.

It is an arithmetic number, because the mean of its divisors is an integer number (107430).

2³⁹³⁸⁹⁹ is an apocalyptic number.

393899 is a deficient number, since it is larger than the sum of its proper divisors (35821).

393899 is a wasteful number, since it uses less digits than its factorization.

393899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35820.

The product of its digits is 52488, while the sum is 41.

The square root of 393899 is about 627.6137347127. The cubic root of 393899 is about 73.3041045133.

The spelling of 393899 in words is "three hundred ninety-three thousand, eight hundred ninety-nine".