191134943 has 2 divisors, whose sum is σ = 191134944. Its totient is φ = 191134942.

The previous prime is 191134939. The next prime is 191134949. The reversal of 191134943 is 349431191.

It is a weak prime.

It is an emirp because it is prime and its reverse (349431191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 191134943 - 2² = 191134939 is a prime.

It is a super-2 number, since 2×191134943² = 73065132871226498, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191134949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95567471 + 95567472.

It is an arithmetic number, because the mean of its divisors is an integer number (95567472).

Almost surely, 2^191134943 is an apocalyptic number.

191134943 is a deficient number, since it is larger than the sum of its proper divisors (1).

191134943 is an equidigital number, since it uses as much as digits as its factorization.

191134943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 35.

The square root of 191134943 is about 13825.1561654833. The cubic root of 191134943 is about 576.0321152602.

The spelling of 191134943 in words is "one hundred ninety-one million, one hundred thirty-four thousand, nine hundred forty-three".