252866809 has 8 divisors (see below), whose sum is σ = 272543040. Its totient is φ = 233222736.

The previous prime is 252866773. The next prime is 252866813. The reversal of 252866809 is 908668252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 252866809 - 2⁹ = 252866297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252866819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9774 + ... + 24520.

It is an arithmetic number, because the mean of its divisors is an integer number (34067880).

Almost surely, 2^252866809 is an apocalyptic number.

It is an amenable number.

252866809 is a deficient number, since it is larger than the sum of its proper divisors (19676231).

252866809 is a wasteful number, since it uses less digits than its factorization.

252866809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16079.

The product of its (nonzero) digits is 414720, while the sum is 46.

The square root of 252866809 is about 15901.7863461939. The cubic root of 252866809 is about 632.3593475620.

The spelling of 252866809 in words is "two hundred fifty-two million, eight hundred sixty-six thousand, eight hundred nine".