253849685 has 4 divisors (see below), whose sum is σ = 304619628. Its totient is φ = 203079744.

The previous prime is 253849649. The next prime is 253849691. The reversal of 253849685 is 586948352.

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

It can be written as a sum of positive squares in 2 ways, for example, as 72301009 + 181548676 = 8503^2 + 13474^2 .

It is a cyclic number.

It is not a de Polignac number, because 253849685 - 2⁶ = 253849621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 25384964 + ... + 25384973.

It is an arithmetic number, because the mean of its divisors is an integer number (76154907).

Almost surely, 2^253849685 is an apocalyptic number.

It is an amenable number.

253849685 is a deficient number, since it is larger than the sum of its proper divisors (50769943).

253849685 is an equidigital number, since it uses as much as digits as its factorization.

253849685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50769942.

The product of its digits is 2073600, while the sum is 50.

The square root of 253849685 is about 15932.6609516427. The cubic root of 253849685 is about 633.1776008293.

The spelling of 253849685 in words is "two hundred fifty-three million, eight hundred forty-nine thousand, six hundred eighty-five".