2393939 has 4 divisors (see below), whose sum is σ = 2449656. Its totient is φ = 2338224.

The previous prime is 2393933. The next prime is 2393947. The reversal of 2393939 is 9393932.

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 2393939 - 2⁸ = 2393683 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 (2393933) 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, 27794 + ... + 27879.

It is an arithmetic number, because the mean of its divisors is an integer number (612414).

2^2393939 is an apocalyptic number.

2393939 is a deficient number, since it is larger than the sum of its proper divisors (55717).

2393939 is an equidigital number, since it uses as much as digits as its factorization.

2393939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55716.

The product of its digits is 39366, while the sum is 38.

The square root of 2393939 is about 1547.2359225406. The cubic root of 2393939 is about 133.7737885309.

The spelling of 2393939 in words is "two million, three hundred ninety-three thousand, nine hundred thirty-nine".