253739 has 4 divisors (see below), whose sum is σ = 256680. Its totient is φ = 250800.

The previous prime is 253733. The next prime is 253741. The reversal of 253739 is 937352.

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-253739 is a prime.

It is a d-powerful number, because it can be written as 2 + 5 + 7⁵ + 3¹⁰ + 3¹¹ + 9³ .

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 253739.

It is not an unprimeable number, because it can be changed into a prime (253733) 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, 1337 + ... + 1514.

It is an arithmetic number, because the mean of its divisors is an integer number (64170).

2²⁵³⁷³⁹ is an apocalyptic number.

253739 is a deficient number, since it is larger than the sum of its proper divisors (2941).

253739 is an equidigital number, since it uses as much as digits as its factorization.

253739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2940.

The product of its digits is 5670, while the sum is 29.

The square root of 253739 is about 503.7251234552. The cubic root of 253739 is about 63.3085560204.

The spelling of 253739 in words is "two hundred fifty-three thousand, seven hundred thirty-nine".