384931 has 4 divisors (see below), whose sum is σ = 407592. Its totient is φ = 362272.

The previous prime is 384919. The next prime is 384941. The reversal of 384931 is 139483.

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

It is a cyclic number.

It is not a de Polignac number, because 384931 - 2¹¹ = 382883 is a prime.

It is a super-2 number, since 2×384931² = 296343749522, which contains 22 as substring.

384931 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 384931.

It is not an unprimeable number, because it can be changed into a prime (384941) 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 3 ways as a sum of consecutive naturals, for example, 11305 + ... + 11338.

It is an arithmetic number, because the mean of its divisors is an integer number (101898).

2³⁸⁴⁹³¹ is an apocalyptic number.

384931 is a deficient number, since it is larger than the sum of its proper divisors (22661).

384931 is a wasteful number, since it uses less digits than its factorization.

384931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22660.

The product of its digits is 2592, while the sum is 28.

The square root of 384931 is about 620.4280780236. The cubic root of 384931 is about 72.7435172520.

The spelling of 384931 in words is "three hundred eighty-four thousand, nine hundred thirty-one".