253939 has 4 divisors (see below), whose sum is σ = 290224. Its totient is φ = 217656.

The previous prime is 253937. The next prime is 253949. The reversal of 253939 is 939352.

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 253939 - 2¹ = 253937 is a prime.

It is a Duffinian number.

253939 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 253939.

It is not an unprimeable number, because it can be changed into a prime (253937) 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, 18132 + ... + 18145.

It is an arithmetic number, because the mean of its divisors is an integer number (72556).

2²⁵³⁹³⁹ is an apocalyptic number.

253939 is a deficient number, since it is larger than the sum of its proper divisors (36285).

253939 is an equidigital number, since it uses as much as digits as its factorization.

253939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36284.

The product of its digits is 7290, while the sum is 31.

The square root of 253939 is about 503.9236053213. The cubic root of 253939 is about 63.3251851629.

The spelling of 253939 in words is "two hundred fifty-three thousand, nine hundred thirty-nine".