11899687 has 2 divisors, whose sum is σ = 11899688. Its totient is φ = 11899686.

The previous prime is 11899673. The next prime is 11899709. The reversal of 11899687 is 78699811.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11899687 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11899687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11899637) 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 as a sum of consecutive naturals, namely, 5949843 + 5949844.

It is an arithmetic number, because the mean of its divisors is an integer number (5949844).

Almost surely, 2^11899687 is an apocalyptic number.

11899687 is a deficient number, since it is larger than the sum of its proper divisors (1).

11899687 is an equidigital number, since it uses as much as digits as its factorization.

11899687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 49.

The square root of 11899687 is about 3449.5922947502. The cubic root of 11899687 is about 228.3031197110.

The spelling of 11899687 in words is "eleven million, eight hundred ninety-nine thousand, six hundred eighty-seven".