2439309 has 8 divisors (see below), whose sum is σ = 3273760. Its totient is φ = 1615536.

The previous prime is 2439301. The next prime is 2439317. The reversal of 2439309 is 9039342.

It is an interprime number because it is at equal distance from previous prime (2439301) and next prime (2439317).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2439309 - 2³ = 2439301 is a prime.

It is a super-3 number, since 3×2439309³ = 43543337046092941887, which contains 333 as substring.

It is a Duffinian number.

2439309 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2439301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2119 + ... + 3060.

It is an arithmetic number, because the mean of its divisors is an integer number (409220).

2^2439309 is an apocalyptic number.

It is an amenable number.

2439309 is a deficient number, since it is larger than the sum of its proper divisors (834451).

2439309 is a wasteful number, since it uses less digits than its factorization.

2439309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5339.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 2439309 is about 1561.8287358094. The cubic root of 2439309 is about 134.6136001689.

The spelling of 2439309 in words is "two million, four hundred thirty-nine thousand, three hundred nine".