5201909 has 2 divisors, whose sum is σ = 5201910. Its totient is φ = 5201908.

The previous prime is 5201873. The next prime is 5201923. The reversal of 5201909 is 9091025.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4431025 + 770884 = 2105^2 + 878^2 .

It is a cyclic number.

It is not a de Polignac number, because 5201909 - 2²⁰ = 4153333 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5201939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2600954 + 2600955.

It is an arithmetic number, because the mean of its divisors is an integer number (2600955).

Almost surely, 2^5201909 is an apocalyptic number.

It is an amenable number.

5201909 is a deficient number, since it is larger than the sum of its proper divisors (1).

5201909 is an equidigital number, since it uses as much as digits as its factorization.

5201909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 5201909 is about 2280.7693877286. The cubic root of 5201909 is about 173.2690191212.

The spelling of 5201909 in words is "five million, two hundred one thousand, nine hundred nine".