2340391 has 4 divisors (see below), whose sum is σ = 2345112. Its totient is φ = 2335672.

The previous prime is 2340383. The next prime is 2340397. The reversal of 2340391 is 1930432.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2340391 - 2³ = 2340383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2340397) 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, 1516 + ... + 2641.

It is an arithmetic number, because the mean of its divisors is an integer number (586278).

2^2340391 is an apocalyptic number.

2340391 is a deficient number, since it is larger than the sum of its proper divisors (4721).

2340391 is an equidigital number, since it uses as much as digits as its factorization.

2340391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4720.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 2340391 is about 1529.8336510876. The cubic root of 2340391 is about 132.7688335618.

The spelling of 2340391 in words is "two million, three hundred forty thousand, three hundred ninety-one".