11943939 has 16 divisors (see below), whose sum is σ = 18249728. Its totient is φ = 6806592.

The previous prime is 11943929. The next prime is 11943941. The reversal of 11943939 is 93934911.

It is not a de Polignac number, because 11943939 - 2⁵ = 11943907 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11943897 and 11943906.

It is not an unprimeable number, because it can be changed into a prime (11943929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12279 + ... + 13215.

It is an arithmetic number, because the mean of its divisors is an integer number (1140608).

Almost surely, 2^11943939 is an apocalyptic number.

11943939 is a deficient number, since it is larger than the sum of its proper divisors (6305789).

11943939 is an equidigital number, since it uses as much as digits as its factorization.

11943939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554.

The product of its digits is 26244, while the sum is 39.

The square root of 11943939 is about 3456.0004340278. Note that the first 3 decimals coincide. The cubic root of 11943939 is about 228.5857706216.

The spelling of 11943939 in words is "eleven million, nine hundred forty-three thousand, nine hundred thirty-nine".