13891890199 has 4 divisors (see below), whose sum is σ = 15154789320. Its totient is φ = 12628991080.

The previous prime is 13891890197. The next prime is 13891890209. The reversal of 13891890199 is 99109819831.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13891890199 - 2¹ = 13891890197 is a prime.

It is a super-2 number, since 2×13891890199² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13891890191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 631449544 + ... + 631449565.

It is an arithmetic number, because the mean of its divisors is an integer number (3788697330).

Almost surely, 2^13891890199 is an apocalyptic number.

13891890199 is a deficient number, since it is larger than the sum of its proper divisors (1262899121).

13891890199 is a wasteful number, since it uses less digits than its factorization.

13891890199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262899120.

The product of its (nonzero) digits is 1259712, while the sum is 58.

The spelling of 13891890199 in words is "thirteen billion, eight hundred ninety-one million, eight hundred ninety thousand, one hundred ninety-nine".