11387999 has 8 divisors (see below), whose sum is σ = 13050528. Its totient is φ = 9734400.

The previous prime is 11387953. The next prime is 11388017. The reversal of 11387999 is 99978311.

It is a happy number.

11387999 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11387999 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 (11387939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 779 + ... + 4835.

It is an arithmetic number, because the mean of its divisors is an integer number (1631316).

Almost surely, 2^11387999 is an apocalyptic number.

11387999 is a deficient number, since it is larger than the sum of its proper divisors (1662529).

11387999 is an equidigital number, since it uses as much as digits as its factorization.

11387999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4465.

The product of its digits is 122472, while the sum is 47.

The square root of 11387999 is about 3374.6109405382. The cubic root of 11387999 is about 224.9827081361.

The spelling of 11387999 in words is "eleven million, three hundred eighty-seven thousand, nine hundred ninety-nine".