5209905 has 16 divisors (see below), whose sum is σ = 8826624. Its totient is φ = 2615040.

The previous prime is 5209901. The next prime is 5209913. The reversal of 5209905 is 5099025.

It is not a de Polignac number, because 5209905 - 2² = 5209901 is a prime.

It is a super-2 number, since 2×5209905² = 54286220218050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5209901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9961 + ... + 10470.

It is an arithmetic number, because the mean of its divisors is an integer number (551664).

Almost surely, 2^5209905 is an apocalyptic number.

It is an amenable number.

5209905 is a deficient number, since it is larger than the sum of its proper divisors (3616719).

5209905 is a wasteful number, since it uses less digits than its factorization.

5209905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20456.

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 5209905 is about 2282.5216318800. The cubic root of 5209905 is about 173.3577525590.

The spelling of 5209905 in words is "five million, two hundred nine thousand, nine hundred five".