2391443 has 4 divisors (see below), whose sum is σ = 2401608. Its totient is φ = 2381280.

The previous prime is 2391439. The next prime is 2391449. The reversal of 2391443 is 3441932.

2391443 = T₂ + T₃ + ... + T₂₄₂.

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 2391443 - 2² = 2391439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2391449) 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, 4721 + ... + 5202.

It is an arithmetic number, because the mean of its divisors is an integer number (600402).

2^2391443 is an apocalyptic number.

2391443 is a deficient number, since it is larger than the sum of its proper divisors (10165).

2391443 is an equidigital number, since it uses as much as digits as its factorization.

2391443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10164.

The product of its digits is 2592, while the sum is 26.

The square root of 2391443 is about 1546.4291125040. The cubic root of 2391443 is about 133.7272800375.

The spelling of 2391443 in words is "two million, three hundred ninety-one thousand, four hundred forty-three".