191827147 has 2 divisors, whose sum is σ = 191827148. Its totient is φ = 191827146.

The previous prime is 191827093. The next prime is 191827157. The reversal of 191827147 is 741728191.

It is a strong prime.

It is an emirp because it is prime and its reverse (741728191) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191827147 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (191827157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95913573 + 95913574.

It is an arithmetic number, because the mean of its divisors is an integer number (95913574).

Almost surely, 2^191827147 is an apocalyptic number.

191827147 is a deficient number, since it is larger than the sum of its proper divisors (1).

191827147 is an equidigital number, since it uses as much as digits as its factorization.

191827147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 40.

The square root of 191827147 is about 13850.1677607168. The cubic root of 191827147 is about 576.7266531129.

The spelling of 191827147 in words is "one hundred ninety-one million, eight hundred twenty-seven thousand, one hundred forty-seven".