5208409 has 4 divisors (see below), whose sum is σ = 5514804. Its totient is φ = 4902016.

The previous prime is 5208407. The next prime is 5208421. The reversal of 5208409 is 9048025.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1968409 + 3240000 = 1403^2 + 1800^2 .

It is a cyclic number.

It is not a de Polignac number, because 5208409 - 2¹ = 5208407 is a prime.

It is a super-2 number, since 2×5208409² = 54255048622562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5208407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153172 + ... + 153205.

It is an arithmetic number, because the mean of its divisors is an integer number (1378701).

Almost surely, 2^5208409 is an apocalyptic number.

It is an amenable number.

5208409 is a deficient number, since it is larger than the sum of its proper divisors (306395).

5208409 is a wasteful number, since it uses less digits than its factorization.

5208409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306394.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 5208409 is about 2282.1939006141. The cubic root of 5208409 is about 173.3411580130.

The spelling of 5208409 in words is "five million, two hundred eight thousand, four hundred nine".