52120009 has 4 divisors (see below), whose sum is σ = 52269700. Its totient is φ = 51970320.

The previous prime is 52119997. The next prime is 52120027. The reversal of 52120009 is 90002125.

52120009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 31326409 + 20793600 = 5597^2 + 4560^2 .

It is a cyclic number.

It is not a de Polignac number, because 52120009 - 2⁹ = 52119497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52120109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74322 + ... + 75019.

It is an arithmetic number, because the mean of its divisors is an integer number (13067425).

Almost surely, 2^52120009 is an apocalyptic number.

It is an amenable number.

52120009 is a deficient number, since it is larger than the sum of its proper divisors (149691).

52120009 is a wasteful number, since it uses less digits than its factorization.

52120009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149690.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 52120009 is about 7219.4188824309. The cubic root of 52120009 is about 373.5380328493.

The spelling of 52120009 in words is "fifty-two million, one hundred twenty thousand, nine".