11867999 has 16 divisors (see below), whose sum is σ = 14061600. Its totient is φ = 9874560.

The previous prime is 11867993. The next prime is 11868013. The reversal of 11867999 is 99976811.

It is a cyclic number.

It is not a de Polignac number, because 11867999 - 2⁸ = 11867743 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 (11867993) 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, 21029 + ... + 21585.

It is an arithmetic number, because the mean of its divisors is an integer number (878850).

Almost surely, 2^11867999 is an apocalyptic number.

11867999 is a deficient number, since it is larger than the sum of its proper divisors (2193601).

11867999 is a wasteful number, since it uses less digits than its factorization.

11867999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730.

The product of its digits is 244944, while the sum is 50.

The square root of 11867999 is about 3444.9962264130. The cubic root of 11867999 is about 228.1002880343.

The spelling of 11867999 in words is "eleven million, eight hundred sixty-seven thousand, nine hundred ninety-nine".