252791389 has 4 divisors (see below), whose sum is σ = 255991360. Its totient is φ = 249591420.

The previous prime is 252791369. The next prime is 252791401. The reversal of 252791389 is 983197252.

252791389 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 252791389 - 2²¹ = 250694237 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 (252791339) 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, 1599867 + ... + 1600024.

It is an arithmetic number, because the mean of its divisors is an integer number (63997840).

Almost surely, 2^252791389 is an apocalyptic number.

It is an amenable number.

252791389 is a deficient number, since it is larger than the sum of its proper divisors (3199971).

252791389 is an equidigital number, since it uses as much as digits as its factorization.

252791389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3199970.

The product of its digits is 272160, while the sum is 46.

The square root of 252791389 is about 15899.4147376562. The cubic root of 252791389 is about 632.2964721896.

The spelling of 252791389 in words is "two hundred fifty-two million, seven hundred ninety-one thousand, three hundred eighty-nine".