338991 has 4 divisors (see below), whose sum is σ = 451992. Its totient is φ = 225992.

The previous prime is 338959. The next prime is 338993. The reversal of 338991 is 199833.

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 338991 - 2⁵ = 338959 is a prime.

It is a super-2 number, since 2×338991² = 229829796162, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 338991.

It is not an unprimeable number, because it can be changed into a prime (338993) 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, 56496 + ... + 56501.

It is an arithmetic number, because the mean of its divisors is an integer number (112998).

2³³⁸⁹⁹¹ is an apocalyptic number.

338991 is a deficient number, since it is larger than the sum of its proper divisors (113001).

338991 is a wasteful number, since it uses less digits than its factorization.

338991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113000.

The product of its digits is 5832, while the sum is 33.

The square root of 338991 is about 582.2293362585. The cubic root of 338991 is about 69.7262094324.

The spelling of 338991 in words is "three hundred thirty-eight thousand, nine hundred ninety-one".