191004043 has 2 divisors, whose sum is σ = 191004044. Its totient is φ = 191004042.

The previous prime is 191004031. The next prime is 191004053. The reversal of 191004043 is 340400191.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191004043 is a prime.

It is not a weakly prime, because it can be changed into another prime (191004053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95502021 + 95502022.

It is an arithmetic number, because the mean of its divisors is an integer number (95502022).

Almost surely, 2^191004043 is an apocalyptic number.

191004043 is a deficient number, since it is larger than the sum of its proper divisors (1).

191004043 is an equidigital number, since it uses as much as digits as its factorization.

191004043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 191004043 is about 13820.4212309177. The cubic root of 191004043 is about 575.9005854580.

The spelling of 191004043 in words is "one hundred ninety-one million, four thousand, forty-three".