253135639 has 4 divisors (see below), whose sum is σ = 253183360. Its totient is φ = 253087920.

The previous prime is 253135621. The next prime is 253135643. The reversal of 253135639 is 936531352.

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 253135639 - 2¹⁹ = 252611351 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 253135598 and 253135607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253135609) 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, 14742 + ... + 26899.

It is an arithmetic number, because the mean of its divisors is an integer number (63295840).

Almost surely, 2^253135639 is an apocalyptic number.

253135639 is a deficient number, since it is larger than the sum of its proper divisors (47721).

253135639 is an equidigital number, since it uses as much as digits as its factorization.

253135639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47720.

The product of its digits is 72900, while the sum is 37.

The square root of 253135639 is about 15910.2369246973. The cubic root of 253135639 is about 632.5833613510.

The spelling of 253135639 in words is "two hundred fifty-three million, one hundred thirty-five thousand, six hundred thirty-nine".