52097209 has 4 divisors (see below), whose sum is σ = 53308816. Its totient is φ = 50885604.

The previous prime is 52097207. The next prime is 52097239. The reversal of 52097209 is 90279025.

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 not a de Polignac number, because 52097209 - 2¹ = 52097207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52097207) 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, 605739 + ... + 605824.

It is an arithmetic number, because the mean of its divisors is an integer number (13327204).

Almost surely, 2^52097209 is an apocalyptic number.

It is an amenable number.

52097209 is a deficient number, since it is larger than the sum of its proper divisors (1211607).

52097209 is a wasteful number, since it uses less digits than its factorization.

52097209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211606.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 52097209 is about 7217.8396352371. The cubic root of 52097209 is about 373.4835565903.

The spelling of 52097209 in words is "fifty-two million, ninety-seven thousand, two hundred nine".