2309409 has 12 divisors (see below), whose sum is σ = 3361956. Its totient is φ = 1527552.

The previous prime is 2309389. The next prime is 2309413. The reversal of 2309409 is 9049032.

It can be written as a sum of positive squares in 2 ways, for example, as 567009 + 1742400 = 753^2 + 1320^2 .

It is not a de Polignac number, because 2309409 - 2⁹ = 2308897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2309449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 297 + ... + 2169.

It is an arithmetic number, because the mean of its divisors is an integer number (280163).

2^2309409 is an apocalyptic number.

It is an amenable number.

2309409 is a deficient number, since it is larger than the sum of its proper divisors (1052547).

2309409 is a wasteful number, since it uses less digits than its factorization.

2309409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2016 (or 2013 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 2309409 is about 1519.6739781940. The cubic root of 2309409 is about 132.1803663806.

The spelling of 2309409 in words is "two million, three hundred nine thousand, four hundred nine".