52000009 has 2 divisors, whose sum is σ = 52000010. Its totient is φ = 52000008.

The previous prime is 52000007. The next prime is 52000019. The reversal of 52000009 is 90000025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45265984 + 6734025 = 6728^2 + 2595^2 .

It is a cyclic number.

It is not a de Polignac number, because 52000009 - 2¹ = 52000007 is a prime.

Together with 52000007, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 51999956 and 52000001.

It is not a weakly prime, because it can be changed into another prime (52000007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26000004 + 26000005.

It is an arithmetic number, because the mean of its divisors is an integer number (26000005).

Almost surely, 2^52000009 is an apocalyptic number.

It is an amenable number.

52000009 is a deficient number, since it is larger than the sum of its proper divisors (1).

52000009 is an equidigital number, since it uses as much as digits as its factorization.

52000009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 52000009 is about 7211.1031749657. The cubic root of 52000009 is about 373.2511372154.

Adding to 52000009 its sum of digits (16), we get a palindrome (52000025).

The spelling of 52000009 in words is "fifty-two million, nine", and thus it is an aban number and an uban number.