2490009 has 4 divisors (see below), whose sum is σ = 3320016. Its totient is φ = 1660004.

The previous prime is 2489999. The next prime is 2490023. The reversal of 2490009 is 9000942.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2490009 - 2⁷ = 2489881 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2490029) 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, 414999 + ... + 415004.

It is an arithmetic number, because the mean of its divisors is an integer number (830004).

2^2490009 is an apocalyptic number.

It is an amenable number.

2490009 is a deficient number, since it is larger than the sum of its proper divisors (830007).

2490009 is an equidigital number, since it uses as much as digits as its factorization.

2490009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830006.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 2490009 is about 1577.9762355625. The cubic root of 2490009 is about 135.5398411367.

The spelling of 2490009 in words is "two million, four hundred ninety thousand, nine".