52748209 has 4 divisors (see below), whose sum is σ = 52899700. Its totient is φ = 52596720.

The previous prime is 52748207. The next prime is 52748233. The reversal of 52748209 is 90284725.

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 44355600 + 8392609 = 6660^2 + 2897^2 .

It is a cyclic number.

It is not a de Polignac number, because 52748209 - 2¹ = 52748207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52748207) 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, 75222 + ... + 75919.

It is an arithmetic number, because the mean of its divisors is an integer number (13224925).

Almost surely, 2^52748209 is an apocalyptic number.

It is an amenable number.

52748209 is a deficient number, since it is larger than the sum of its proper divisors (151491).

52748209 is a wasteful number, since it uses less digits than its factorization.

52748209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151490.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 52748209 is about 7262.7962245956. The cubic root of 52748209 is about 375.0327888367.

The spelling of 52748209 in words is "fifty-two million, seven hundred forty-eight thousand, two hundred nine".