252761917 has 4 divisors (see below), whose sum is σ = 256322016. Its totient is φ = 249201820.

The previous prime is 252761891. The next prime is 252761983. The reversal of 252761917 is 719167252.

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 a de Polignac number, because none of the positive numbers 2^k-252761917 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 252761917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252765917) 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, 1779943 + ... + 1780084.

It is an arithmetic number, because the mean of its divisors is an integer number (64080504).

Almost surely, 2^252761917 is an apocalyptic number.

It is an amenable number.

252761917 is a deficient number, since it is larger than the sum of its proper divisors (3560099).

252761917 is an equidigital number, since it uses as much as digits as its factorization.

252761917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3560098.

The product of its digits is 52920, while the sum is 40.

The square root of 252761917 is about 15898.4878840725. The cubic root of 252761917 is about 632.2718988765.

The spelling of 252761917 in words is "two hundred fifty-two million, seven hundred sixty-one thousand, nine hundred seventeen".