14181999 has 16 divisors (see below), whose sum is σ = 21436800. Its totient is φ = 8267616.

The previous prime is 14181997. The next prime is 14182009. The reversal of 14181999 is 99918141.

It is a happy number.

It is not a de Polignac number, because 14181999 - 2¹ = 14181997 is a prime.

It is a super-2 number, since 2×14181999² = 402258191272002, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 14181999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14181997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8829 + ... + 10310.

It is an arithmetic number, because the mean of its divisors is an integer number (1339800).

Almost surely, 2^14181999 is an apocalyptic number.

14181999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

14181999 is a deficient number, since it is larger than the sum of its proper divisors (7254801).

14181999 is a wasteful number, since it uses less digits than its factorization.

14181999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19174.

The product of its digits is 23328, while the sum is 42.

The square root of 14181999 is about 3765.8994941448. The cubic root of 14181999 is about 242.0541224029.

The spelling of 14181999 in words is "fourteen million, one hundred eighty-one thousand, nine hundred ninety-nine".