191849 has 4 divisors (see below), whose sum is σ = 219264. Its totient is φ = 164436.

The previous prime is 191837. The next prime is 191861. The reversal of 191849 is 948191.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 948191 = 109 ⋅8699.

It is an interprime number because it is at equal distance from previous prime (191837) and next prime (191861).

It is a cyclic number.

It is not a de Polignac number, because 191849 - 2⁴ = 191833 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191899) 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, 13697 + ... + 13710.

It is an arithmetic number, because the mean of its divisors is an integer number (54816).

2¹⁹¹⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

191849 is a deficient number, since it is larger than the sum of its proper divisors (27415).

191849 is an equidigital number, since it uses as much as digits as its factorization.

191849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27414.

The product of its digits is 2592, while the sum is 32.

The square root of 191849 is about 438.0057077254. The cubic root of 191849 is about 57.6748552566.

The spelling of 191849 in words is "one hundred ninety-one thousand, eight hundred forty-nine".