11439999 has 6 divisors (see below), whose sum is σ = 16524456. Its totient is φ = 7626660.

The previous prime is 11439979. The next prime is 11440003. The reversal of 11439999 is 99993411.

11439999 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11439999 - 2¹² = 11435903 is a prime.

11439999 is a modest number, since divided by 9999 gives 1143 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11439959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 635547 + ... + 635564.

It is an arithmetic number, because the mean of its divisors is an integer number (2754076).

Almost surely, 2^11439999 is an apocalyptic number.

11439999 is a deficient number, since it is larger than the sum of its proper divisors (5084457).

11439999 is a wasteful number, since it uses less digits than its factorization.

11439999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271117 (or 1271114 counting only the distinct ones).

The product of its digits is 78732, while the sum is 45.

The square root of 11439999 is about 3382.3067572295. The cubic root of 11439999 is about 225.3246277015.

It can be divided in two parts, 1 and 1439999, that added together give a square (1440000 = 1200²).

The spelling of 11439999 in words is "eleven million, four hundred thirty-nine thousand, nine hundred ninety-nine".