52908209 has 4 divisors (see below), whose sum is σ = 54732660. Its totient is φ = 51083760.

The previous prime is 52908181. The next prime is 52908221. The reversal of 52908209 is 90280925.

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 21827584 + 31080625 = 4672^2 + 5575^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52908209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52908239) 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, 912182 + ... + 912239.

It is an arithmetic number, because the mean of its divisors is an integer number (13683165).

Almost surely, 2^52908209 is an apocalyptic number.

It is an amenable number.

52908209 is a deficient number, since it is larger than the sum of its proper divisors (1824451).

52908209 is a wasteful number, since it uses less digits than its factorization.

52908209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824450.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 52908209 is about 7273.8029255679. The cubic root of 52908209 is about 375.4115990277.

The spelling of 52908209 in words is "fifty-two million, nine hundred eight thousand, two hundred nine".