2009381 has 8 divisors (see below), whose sum is σ = 2268000. Its totient is φ = 1763440.

The previous prime is 2009377. The next prime is 2009387. The reversal of 2009381 is 1839002.

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 2009381 - 2² = 2009377 is a prime.

It is a super-2 number, since 2×2009381² = 8075224006322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2009387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2831 + ... + 3468.

It is an arithmetic number, because the mean of its divisors is an integer number (283500).

2^2009381 is an apocalyptic number.

It is an amenable number.

2009381 is a deficient number, since it is larger than the sum of its proper divisors (258619).

2009381 is a wasteful number, since it uses less digits than its factorization.

2009381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6339.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 2009381 is about 1417.5263665978. The cubic root of 2009381 is about 126.1887864539.

The spelling of 2009381 in words is "two million, nine thousand, three hundred eighty-one".