11439939 has 8 divisors (see below), whose sum is σ = 17432320. Its totient is φ = 6537096.

The previous prime is 11439937. The next prime is 11439959. The reversal of 11439939 is 93993411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11439939 - 2¹ = 11439937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11439897 and 11439906.

It is not an unprimeable number, because it can be changed into a prime (11439937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 272359 + ... + 272400.

It is an arithmetic number, because the mean of its divisors is an integer number (2179040).

Almost surely, 2^11439939 is an apocalyptic number.

11439939 is a deficient number, since it is larger than the sum of its proper divisors (5992381).

11439939 is an equidigital number, since it uses as much as digits as its factorization.

11439939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544769.

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

The square root of 11439939 is about 3382.2978875315. The cubic root of 11439939 is about 225.3242337766.

The spelling of 11439939 in words is "eleven million, four hundred thirty-nine thousand, nine hundred thirty-nine".