5145809 has 2 divisors, whose sum is σ = 5145810. Its totient is φ = 5145808.

The previous prime is 5145779. The next prime is 5145817. The reversal of 5145809 is 9085415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4840000 + 305809 = 2200^2 + 553^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5145809 is a prime.

It is not a weakly prime, because it can be changed into another prime (5144809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2572904 + 2572905.

It is an arithmetic number, because the mean of its divisors is an integer number (2572905).

Almost surely, 2^5145809 is an apocalyptic number.

It is an amenable number.

5145809 is a deficient number, since it is larger than the sum of its proper divisors (1).

5145809 is an equidigital number, since it uses as much as digits as its factorization.

5145809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 5145809 is about 2268.4375680190. The cubic root of 5145809 is about 172.6438930988.

The spelling of 5145809 in words is "five million, one hundred forty-five thousand, eight hundred nine".