252739813 has 4 divisors (see below), whose sum is σ = 254290528. Its totient is φ = 251189100.

The previous prime is 252739811. The next prime is 252739829. The reversal of 252739813 is 318937252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 252739813 - 2¹ = 252739811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252739811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 775113 + ... + 775438.

It is an arithmetic number, because the mean of its divisors is an integer number (63572632).

Almost surely, 2^252739813 is an apocalyptic number.

It is an amenable number.

252739813 is a deficient number, since it is larger than the sum of its proper divisors (1550715).

252739813 is a wasteful number, since it uses less digits than its factorization.

252739813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1550714.

The product of its digits is 90720, while the sum is 40.

The square root of 252739813 is about 15897.7927084234. The cubic root of 252739813 is about 632.2534676381.

The spelling of 252739813 in words is "two hundred fifty-two million, seven hundred thirty-nine thousand, eight hundred thirteen".