191011027 has 2 divisors, whose sum is σ = 191011028. Its totient is φ = 191011026.

The previous prime is 191010991. The next prime is 191011033. The reversal of 191011027 is 720110191.

191011027 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 is a cyclic number.

It is not a de Polignac number, because 191011027 - 2⁷ = 191010899 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 191010989 and 191011007.

It is not a weakly prime, because it can be changed into another prime (191011097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95505513 + 95505514.

It is an arithmetic number, because the mean of its divisors is an integer number (95505514).

Almost surely, 2^191011027 is an apocalyptic number.

191011027 is a deficient number, since it is larger than the sum of its proper divisors (1).

191011027 is an equidigital number, since it uses as much as digits as its factorization.

191011027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 22.

The square root of 191011027 is about 13820.6738981860. The cubic root of 191011027 is about 575.9076045776.

The spelling of 191011027 in words is "one hundred ninety-one million, eleven thousand, twenty-seven".