191814 has 16 divisors (see below), whose sum is σ = 438528. Its totient is φ = 54792.

The previous prime is 191803. The next prime is 191827. The reversal of 191814 is 418191.

It is a super-2 number, since 2×191814² = 73585221192, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 191814.

It is an unprimeable number.

191814 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2242 + ... + 2325.

It is an arithmetic number, because the mean of its divisors is an integer number (27408).

2¹⁹¹⁸¹⁴ is an apocalyptic number.

191814 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

191814 is an abundant number, since it is smaller than the sum of its proper divisors (246714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191814 is a wasteful number, since it uses less digits than its factorization.

191814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4579.

The product of its digits is 288, while the sum is 24.

The square root of 191814 is about 437.9657520857. The cubic root of 191814 is about 57.6713477365.

The spelling of 191814 in words is "one hundred ninety-one thousand, eight hundred fourteen".