13199887 has 2 divisors, whose sum is σ = 13199888. Its totient is φ = 13199886.

The previous prime is 13199867. The next prime is 13199891. The reversal of 13199887 is 78899131.

13199887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13199887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13199867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6599943 + 6599944.

It is an arithmetic number, because the mean of its divisors is an integer number (6599944).

Almost surely, 2^13199887 is an apocalyptic number.

13199887 is a deficient number, since it is larger than the sum of its proper divisors (1).

13199887 is an equidigital number, since it uses as much as digits as its factorization.

13199887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 46.

The square root of 13199887 is about 3633.1648737705. The cubic root of 13199887 is about 236.3324757066.

The spelling of 13199887 in words is "thirteen million, one hundred ninety-nine thousand, eight hundred eighty-seven".