191427 has 4 divisors (see below), whose sum is σ = 255240. Its totient is φ = 127616.

The previous prime is 191413. The next prime is 191441. The reversal of 191427 is 724191.

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

It is an interprime number because it is at equal distance from previous prime (191413) and next prime (191441).

It is a cyclic number.

It is not a de Polignac number, because 191427 - 2⁷ = 191299 is a prime.

It is a D-number.

191427 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 191397 and 191406.

It is not an unprimeable number, because it can be changed into a prime (191447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31902 + ... + 31907.

It is an arithmetic number, because the mean of its divisors is an integer number (63810).

2¹⁹¹⁴²⁷ is an apocalyptic number.

191427 is a deficient number, since it is larger than the sum of its proper divisors (63813).

191427 is an equidigital number, since it uses as much as digits as its factorization.

191427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63812.

The product of its digits is 504, while the sum is 24.

The square root of 191427 is about 437.5237136430. The cubic root of 191427 is about 57.6325361127.

The spelling of 191427 in words is "one hundred ninety-one thousand, four hundred twenty-seven".