253668013 has 4 divisors (see below), whose sum is σ = 254584060. Its totient is φ = 252751968.

The previous prime is 253668011. The next prime is 253668043. The reversal of 253668013 is 310866352.

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 27857284 + 225810729 = 5278^2 + 15027^2 .

It is a cyclic number.

It is not a de Polignac number, because 253668013 - 2¹ = 253668011 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 253668013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253668011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 457608 + ... + 458161.

It is an arithmetic number, because the mean of its divisors is an integer number (63646015).

Almost surely, 2^253668013 is an apocalyptic number.

It is an amenable number.

253668013 is a deficient number, since it is larger than the sum of its proper divisors (916047).

253668013 is an equidigital number, since it uses as much as digits as its factorization.

253668013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916046.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 253668013 is about 15926.9586864536. The cubic root of 253668013 is about 633.0265165459.

The spelling of 253668013 in words is "two hundred fifty-three million, six hundred sixty-eight thousand, thirteen".