191793137 has 2 divisors, whose sum is σ = 191793138. Its totient is φ = 191793136.

The previous prime is 191793127. The next prime is 191793143. The reversal of 191793137 is 731397191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127215841 + 64577296 = 11279^2 + 8036^2 .

It is a cyclic number.

It is not a de Polignac number, because 191793137 - 2⁶ = 191793073 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 191793094 and 191793103.

It is not a weakly prime, because it can be changed into another prime (191793127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95896568 + 95896569.

It is an arithmetic number, because the mean of its divisors is an integer number (95896569).

Almost surely, 2^191793137 is an apocalyptic number.

It is an amenable number.

191793137 is a deficient number, since it is larger than the sum of its proper divisors (1).

191793137 is an equidigital number, since it uses as much as digits as its factorization.

191793137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35721, while the sum is 41.

The square root of 191793137 is about 13848.9399233299. The cubic root of 191793137 is about 576.6925675084.

The spelling of 191793137 in words is "one hundred ninety-one million, seven hundred ninety-three thousand, one hundred thirty-seven".