11990863 has 2 divisors, whose sum is σ = 11990864. Its totient is φ = 11990862.

The previous prime is 11990861. The next prime is 11990873. The reversal of 11990863 is 36809911.

It is a weak prime.

It is an emirp because it is prime and its reverse (36809911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11990863 - 2¹ = 11990861 is a prime.

Together with 11990861, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11990861) 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 as a sum of consecutive naturals, namely, 5995431 + 5995432.

It is an arithmetic number, because the mean of its divisors is an integer number (5995432).

Almost surely, 2^11990863 is an apocalyptic number.

11990863 is a deficient number, since it is larger than the sum of its proper divisors (1).

11990863 is an equidigital number, since it uses as much as digits as its factorization.

11990863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 11990863 is about 3462.7825516483. The cubic root of 11990863 is about 228.8847267897.

The spelling of 11990863 in words is "eleven million, nine hundred ninety thousand, eight hundred sixty-three".