191582047 has 2 divisors, whose sum is σ = 191582048. Its totient is φ = 191582046.

The previous prime is 191581981. The next prime is 191582051. The reversal of 191582047 is 740285191.

It is a strong prime.

It is an emirp because it is prime and its reverse (740285191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 191582047 - 2¹⁹ = 191057759 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 191581997 and 191582015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191582647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95791023 + 95791024.

It is an arithmetic number, because the mean of its divisors is an integer number (95791024).

Almost surely, 2^191582047 is an apocalyptic number.

191582047 is a deficient number, since it is larger than the sum of its proper divisors (1).

191582047 is an equidigital number, since it uses as much as digits as its factorization.

191582047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 191582047 is about 13841.3166642484. The cubic root of 191582047 is about 576.4809180824.

The spelling of 191582047 in words is "one hundred ninety-one million, five hundred eighty-two thousand, forty-seven".