13891807 has 2 divisors, whose sum is σ = 13891808. Its totient is φ = 13891806.

The previous prime is 13891781. The next prime is 13891811. The reversal of 13891807 is 70819831.

It is a strong prime.

It is an emirp because it is prime and its reverse (70819831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13891807 - 2¹⁵ = 13859039 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13891817) 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, 6945903 + 6945904.

It is an arithmetic number, because the mean of its divisors is an integer number (6945904).

Almost surely, 2^13891807 is an apocalyptic number.

13891807 is a deficient number, since it is larger than the sum of its proper divisors (1).

13891807 is an equidigital number, since it uses as much as digits as its factorization.

13891807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 13891807 is about 3727.1714476262. The cubic root of 13891807 is about 240.3917617837.

The spelling of 13891807 in words is "thirteen million, eight hundred ninety-one thousand, eight hundred seven".