13331887 has 2 divisors, whose sum is σ = 13331888. Its totient is φ = 13331886.

The previous prime is 13331873. The next prime is 13331897. The reversal of 13331887 is 78813331.

It is a strong prime.

It is an emirp because it is prime and its reverse (78813331) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13331887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13331867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6665943 + 6665944.

It is an arithmetic number, because the mean of its divisors is an integer number (6665944).

Almost surely, 2^13331887 is an apocalyptic number.

13331887 is a deficient number, since it is larger than the sum of its proper divisors (1).

13331887 is an equidigital number, since it uses as much as digits as its factorization.

13331887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 34.

The square root of 13331887 is about 3651.2856639819. The cubic root of 13331887 is about 237.1176459004.

The spelling of 13331887 in words is "thirteen million, three hundred thirty-one thousand, eight hundred eighty-seven".