191249 has 2 divisors, whose sum is σ = 191250. Its totient is φ = 191248.

The previous prime is 191237. The next prime is 191251. The reversal of 191249 is 942191.

191249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165649 + 25600 = 407^2 + 160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191249 is a prime.

Together with 191251, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (191299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95624 + 95625.

It is an arithmetic number, because the mean of its divisors is an integer number (95625).

2¹⁹¹²⁴⁹ is an apocalyptic number.

It is an amenable number.

191249 is a deficient number, since it is larger than the sum of its proper divisors (1).

191249 is an equidigital number, since it uses as much as digits as its factorization.

191249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 26.

The square root of 191249 is about 437.3202487880. The cubic root of 191249 is about 57.6146672075.

The spelling of 191249 in words is "one hundred ninety-one thousand, two hundred forty-nine".