252909287 has 4 divisors (see below), whose sum is σ = 253119000. Its totient is φ = 252699576.

The previous prime is 252909277. The next prime is 252909301. The reversal of 252909287 is 782909252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 252909287 - 2⁴ = 252909271 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 (252909277) 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, 103037 + ... + 105462.

It is an arithmetic number, because the mean of its divisors is an integer number (63279750).

Almost surely, 2^252909287 is an apocalyptic number.

252909287 is a deficient number, since it is larger than the sum of its proper divisors (209713).

252909287 is a wasteful number, since it uses less digits than its factorization.

252909287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209712.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 252909287 is about 15903.1219262131. The cubic root of 252909287 is about 632.3947546821.

The spelling of 252909287 in words is "two hundred fifty-two million, nine hundred nine thousand, two hundred eighty-seven".