191449 has 2 divisors, whose sum is σ = 191450. Its totient is φ = 191448.

The previous prime is 191447. The next prime is 191453. The reversal of 191449 is 944191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110224 + 81225 = 332^2 + 285^2 .

It is an emirp because it is prime and its reverse (944191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 191449 - 2¹ = 191447 is a prime.

Together with 191447, it forms a pair of twin primes.

191449 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95724 + 95725.

It is an arithmetic number, because the mean of its divisors is an integer number (95725).

2¹⁹¹⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

191449 is a deficient number, since it is larger than the sum of its proper divisors (1).

191449 is an equidigital number, since it uses as much as digits as its factorization.

191449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 28.

The square root of 191449 is about 437.5488544151. The cubic root of 191449 is about 57.6347438598.

The spelling of 191449 in words is "one hundred ninety-one thousand, four hundred forty-nine".