191734423 has 2 divisors, whose sum is σ = 191734424. Its totient is φ = 191734422.

The previous prime is 191734393. The next prime is 191734429. The reversal of 191734423 is 324437191.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191734423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191734429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95867211 + 95867212.

It is an arithmetic number, because the mean of its divisors is an integer number (95867212).

Almost surely, 2^191734423 is an apocalyptic number.

191734423 is a deficient number, since it is larger than the sum of its proper divisors (1).

191734423 is an equidigital number, since it uses as much as digits as its factorization.

191734423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 34.

The square root of 191734423 is about 13846.8199598319. The cubic root of 191734423 is about 576.6337135026.

The spelling of 191734423 in words is "one hundred ninety-one million, seven hundred thirty-four thousand, four hundred twenty-three".