2391843 has 4 divisors (see below), whose sum is σ = 3189128. Its totient is φ = 1594560.

The previous prime is 2391827. The next prime is 2391847. The reversal of 2391843 is 3481932.

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

It is not a de Polignac number, because 2391843 - 2⁴ = 2391827 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2391843.

It is not an unprimeable number, because it can be changed into a prime (2391847) 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, 398638 + ... + 398643.

It is an arithmetic number, because the mean of its divisors is an integer number (797282).

2^2391843 is an apocalyptic number.

2391843 is a deficient number, since it is larger than the sum of its proper divisors (797285).

2391843 is an equidigital number, since it uses as much as digits as its factorization.

2391843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797284.

The product of its digits is 5184, while the sum is 30.

The square root of 2391843 is about 1546.5584373052. The cubic root of 2391843 is about 133.7347354985.

The spelling of 2391843 in words is "two million, three hundred ninety-one thousand, eight hundred forty-three".