13749887 has 2 divisors, whose sum is σ = 13749888. Its totient is φ = 13749886.

The previous prime is 13749859. The next prime is 13749893. The reversal of 13749887 is 78894731.

It is a strong prime.

It is an emirp because it is prime and its reverse (78894731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13749887 - 2⁶ = 13749823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13749817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6874943 + 6874944.

It is an arithmetic number, because the mean of its divisors is an integer number (6874944).

Almost surely, 2^13749887 is an apocalyptic number.

13749887 is a deficient number, since it is larger than the sum of its proper divisors (1).

13749887 is an equidigital number, since it uses as much as digits as its factorization.

13749887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 47.

The square root of 13749887 is about 3708.0840065996. The cubic root of 13749887 is about 239.5703365720.

The spelling of 13749887 in words is "thirteen million, seven hundred forty-nine thousand, eight hundred eighty-seven".