2504009 has 2 divisors, whose sum is σ = 2504010. Its totient is φ = 2504008.

The previous prime is 2503999. The next prime is 2504011. The reversal of 2504009 is 9004052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1974025 + 529984 = 1405^2 + 728^2 .

It is a cyclic number.

It is not a de Polignac number, because 2504009 - 2¹⁶ = 2438473 is a prime.

It is a super-2 number, since 2×2504009² = 12540122144162, which contains 22 as substring.

Together with 2504011, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (2504069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1252004 + 1252005.

It is an arithmetic number, because the mean of its divisors is an integer number (1252005).

2^2504009 is an apocalyptic number.

It is an amenable number.

2504009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2504009 is an equidigital number, since it uses as much as digits as its factorization.

2504009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 2504009 is about 1582.4060793614. The cubic root of 2504009 is about 135.7933894201.

The spelling of 2504009 in words is "two million, five hundred four thousand, nine".