11986999 has 2 divisors, whose sum is σ = 11987000. Its totient is φ = 11986998.

The previous prime is 11986991. The next prime is 11987011. The reversal of 11986999 is 99968911.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11986999 - 2³ = 11986991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11986991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5993499 + 5993500.

It is an arithmetic number, because the mean of its divisors is an integer number (5993500).

Almost surely, 2^11986999 is an apocalyptic number.

11986999 is a deficient number, since it is larger than the sum of its proper divisors (1).

11986999 is an equidigital number, since it uses as much as digits as its factorization.

11986999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 314928, while the sum is 52.

The square root of 11986999 is about 3462.2245738831. The cubic root of 11986999 is about 228.8601384677.

The spelling of 11986999 in words is "eleven million, nine hundred eighty-six thousand, nine hundred ninety-nine".