252776389 has 4 divisors (see below), whose sum is σ = 253030924. Its totient is φ = 252521856.

The previous prime is 252776353. The next prime is 252776423. The reversal of 252776389 is 983677252.

252776389 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.

It can be written as a sum of positive squares in 2 ways, for example, as 108368100 + 144408289 = 10410^2 + 12017^2 .

It is a cyclic number.

It is not a de Polignac number, because 252776389 - 2⁷ = 252776261 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 (252776309) 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, 125772 + ... + 127765.

It is an arithmetic number, because the mean of its divisors is an integer number (63257731).

Almost surely, 2^252776389 is an apocalyptic number.

It is an amenable number.

252776389 is a deficient number, since it is larger than the sum of its proper divisors (254535).

252776389 is an equidigital number, since it uses as much as digits as its factorization.

252776389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254534.

The product of its digits is 1270080, while the sum is 49.

The square root of 252776389 is about 15898.9430151819. The cubic root of 252776389 is about 632.2839656525.

The spelling of 252776389 in words is "two hundred fifty-two million, seven hundred seventy-six thousand, three hundred eighty-nine".