382991 has 4 divisors (see below), whose sum is σ = 437712. Its totient is φ = 328272.

The previous prime is 382979. The next prime is 382999. The reversal of 382991 is 199283.

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

It is not a de Polignac number, because 382991 - 2¹⁴ = 366607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (382999) 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, 27350 + ... + 27363.

It is an arithmetic number, because the mean of its divisors is an integer number (109428).

2³⁸²⁹⁹¹ is an apocalyptic number.

382991 is a deficient number, since it is larger than the sum of its proper divisors (54721).

382991 is an equidigital number, since it uses as much as digits as its factorization.

382991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54720.

The product of its digits is 3888, while the sum is 32.

The square root of 382991 is about 618.8626665101. The cubic root of 382991 is about 72.6211055567.

The spelling of 382991 in words is "three hundred eighty-two thousand, nine hundred ninety-one".