5031809 has 2 divisors, whose sum is σ = 5031810. Its totient is φ = 5031808.

The previous prime is 5031799. The next prime is 5031811. The reversal of 5031809 is 9081305.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2900209 + 2131600 = 1703^2 + 1460^2 .

It is a cyclic number.

It is not a de Polignac number, because 5031809 - 2⁸ = 5031553 is a prime.

It is a Sophie Germain prime.

Together with 5031811, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (5031899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2515904 + 2515905.

It is an arithmetic number, because the mean of its divisors is an integer number (2515905).

Almost surely, 2^5031809 is an apocalyptic number.

It is an amenable number.

5031809 is a deficient number, since it is larger than the sum of its proper divisors (1).

5031809 is an equidigital number, since it uses as much as digits as its factorization.

5031809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 5031809 is about 2243.1694095632. The cubic root of 5031809 is about 171.3594459066.

The spelling of 5031809 in words is "five million, thirty-one thousand, eight hundred nine".