11403999 has 12 divisors (see below), whose sum is σ = 16643536. Its totient is φ = 7523712.

The previous prime is 11403967. The next prime is 11404007. The reversal of 11403999 is 99930411.

It is not a de Polignac number, because 11403999 - 2⁵ = 11403967 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 (11403919) 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 11 ways as a sum of consecutive naturals, for example, 5659 + ... + 7404.

Almost surely, 2^11403999 is an apocalyptic number.

11403999 is a deficient number, since it is larger than the sum of its proper divisors (5239537).

11403999 is a wasteful number, since it uses less digits than its factorization.

11403999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13166 (or 13163 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 11403999 is about 3376.9807520920. The cubic root of 11403999 is about 225.0880248176.

The spelling of 11403999 in words is "eleven million, four hundred three thousand, nine hundred ninety-nine".