2909381 has 4 divisors (see below), whose sum is σ = 3003264. Its totient is φ = 2815500.

The previous prime is 2909377. The next prime is 2909383. The reversal of 2909381 is 1839092.

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 2909381 - 2² = 2909377 is a prime.

It is a super-2 number, since 2×2909381² = 16928995606322, 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 (2909383) 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, 46895 + ... + 46956.

It is an arithmetic number, because the mean of its divisors is an integer number (750816).

2^2909381 is an apocalyptic number.

It is an amenable number.

2909381 is a deficient number, since it is larger than the sum of its proper divisors (93883).

2909381 is an equidigital number, since it uses as much as digits as its factorization.

2909381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93882.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 2909381 is about 1705.6907691607. The cubic root of 2909381 is about 142.7579159989.

The spelling of 2909381 in words is "two million, nine hundred nine thousand, three hundred eighty-one".