252872309 has 4 divisors (see below), whose sum is σ = 252943680. Its totient is φ = 252800940.

The previous prime is 252872299. The next prime is 252872329. The reversal of 252872309 is 903278252.

252872309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 252872309 - 2¹⁶ = 252806773 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 (252872329) 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, 30077 + ... + 37554.

It is an arithmetic number, because the mean of its divisors is an integer number (63235920).

Almost surely, 2^252872309 is an apocalyptic number.

It is an amenable number.

252872309 is a deficient number, since it is larger than the sum of its proper divisors (71371).

252872309 is an equidigital number, since it uses as much as digits as its factorization.

252872309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71370.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 252872309 is about 15901.9592817992. The cubic root of 252872309 is about 632.3639322565.

The spelling of 252872309 in words is "two hundred fifty-two million, eight hundred seventy-two thousand, three hundred nine".