191159047 has 2 divisors, whose sum is σ = 191159048. Its totient is φ = 191159046.

The previous prime is 191159027. The next prime is 191159063. The reversal of 191159047 is 740951191.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191159047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 191158997 and 191159015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191159027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95579523 + 95579524.

It is an arithmetic number, because the mean of its divisors is an integer number (95579524).

Almost surely, 2^191159047 is an apocalyptic number.

191159047 is a deficient number, since it is larger than the sum of its proper divisors (1).

191159047 is an equidigital number, since it uses as much as digits as its factorization.

191159047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 37.

The square root of 191159047 is about 13826.0278822227. The cubic root of 191159047 is about 576.0563286846.

The spelling of 191159047 in words is "one hundred ninety-one million, one hundred fifty-nine thousand, forty-seven".