13891903 has 2 divisors, whose sum is σ = 13891904. Its totient is φ = 13891902.

The previous prime is 13891901. The next prime is 13891949. The reversal of 13891903 is 30919831.

It is a weak prime.

It is an emirp because it is prime and its reverse (30919831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13891903 - 2¹ = 13891901 is a prime.

It is a super-2 number, since 2×13891903² = 385969937922818, which contains 22 as substring.

Together with 13891901, 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 (13891901) 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, 6945951 + 6945952.

It is an arithmetic number, because the mean of its divisors is an integer number (6945952).

Almost surely, 2^13891903 is an apocalyptic number.

13891903 is a deficient number, since it is larger than the sum of its proper divisors (1).

13891903 is an equidigital number, since it uses as much as digits as its factorization.

13891903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 13891903 is about 3727.1843260027. The cubic root of 13891903 is about 240.3923155287.

The spelling of 13891903 in words is "thirteen million, eight hundred ninety-one thousand, nine hundred three".