5205125609 has 2 divisors, whose sum is σ = 5205125610. Its totient is φ = 5205125608.

The previous prime is 5205125567. The next prime is 5205125623. The reversal of 5205125609 is 9065215025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4518528400 + 686597209 = 67220^2 + 26203^2 .

It is a cyclic number.

It is not a de Polignac number, because 5205125609 - 2²⁰ = 5204077033 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (5205125689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2602562804 + 2602562805.

It is an arithmetic number, because the mean of its divisors is an integer number (2602562805).

Almost surely, 2^5205125609 is an apocalyptic number.

It is an amenable number.

5205125609 is a deficient number, since it is larger than the sum of its proper divisors (1).

5205125609 is an equidigital number, since it uses as much as digits as its factorization.

5205125609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 5205125609 is about 72146.5564597507. The cubic root of 5205125609 is about 1733.0472549029.

The spelling of 5205125609 in words is "five billion, two hundred five million, one hundred twenty-five thousand, six hundred nine".