191381049 has 10 divisors (see below), whose sum is σ = 285890330. Its totient is φ = 127587312.

The previous prime is 191381041. The next prime is 191381059. The reversal of 191381049 is 940183191.

It can be written as a sum of positive squares in only one way, i.e., 154256400 + 37124649 = 12420^2 + 6093^2 .

It is not a de Polignac number, because 191381049 - 2³ = 191381041 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (191381041) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1181284 + ... + 1181445.

It is an arithmetic number, because the mean of its divisors is an integer number (28589033).

Almost surely, 2^191381049 is an apocalyptic number.

It is an amenable number.

191381049 is a deficient number, since it is larger than the sum of its proper divisors (94509281).

191381049 is an equidigital number, since it uses as much as digits as its factorization.

191381049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2362741 (or 2362732 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 191381049 is about 13834.0539611496. The cubic root of 191381049 is about 576.2792428573.

The spelling of 191381049 in words is "one hundred ninety-one million, three hundred eighty-one thousand, forty-nine".