2381309 has 8 divisors (see below), whose sum is σ = 2881728. Its totient is φ = 1920960.

The previous prime is 2381303. The next prime is 2381311. The reversal of 2381309 is 9031832.

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

It is a cyclic number.

It is not a de Polignac number, because 2381309 - 2⁸ = 2381053 is a prime.

It is a Duffinian number.

2381309 is a modest number, since divided by 1309 gives 238 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2381303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9887 + ... + 10124.

It is an arithmetic number, because the mean of its divisors is an integer number (360216).

2^2381309 is an apocalyptic number.

It is an amenable number.

2381309 is a deficient number, since it is larger than the sum of its proper divisors (500419).

2381309 is a wasteful number, since it uses less digits than its factorization.

2381309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20035.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 2381309 is about 1543.1490530730. The cubic root of 2381309 is about 133.5381179523.

The spelling of 2381309 in words is "two million, three hundred eighty-one thousand, three hundred nine".