13891869 has 12 divisors (see below), whose sum is σ = 21122400. Its totient is φ = 8773704.

The previous prime is 13891861. The next prime is 13891897. The reversal of 13891869 is 96819831.

It is not a de Polignac number, because 13891869 - 2³ = 13891861 is a prime.

It is a super-2 number, since 2×13891869² = 385968048626322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13891861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40449 + ... + 40790.

It is an arithmetic number, because the mean of its divisors is an integer number (1760200).

Almost surely, 2^13891869 is an apocalyptic number.

13891869 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13891869 is a deficient number, since it is larger than the sum of its proper divisors (7230531).

13891869 is a wasteful number, since it uses less digits than its factorization.

13891869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81264 (or 81261 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 13891869 is about 3727.1797649161. The cubic root of 13891869 is about 240.3921194110.

The spelling of 13891869 in words is "thirteen million, eight hundred ninety-one thousand, eight hundred sixty-nine".