191740013 has 2 divisors, whose sum is σ = 191740014. Its totient is φ = 191740012.

The previous prime is 191739971. The next prime is 191740033. The reversal of 191740013 is 310047191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182871529 + 8868484 = 13523^2 + 2978^2 .

It is a cyclic number.

It is not a de Polignac number, because 191740013 - 2⁶ = 191739949 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191740033) 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, 95870006 + 95870007.

It is an arithmetic number, because the mean of its divisors is an integer number (95870007).

Almost surely, 2^191740013 is an apocalyptic number.

It is an amenable number.

191740013 is a deficient number, since it is larger than the sum of its proper divisors (1).

191740013 is an equidigital number, since it uses as much as digits as its factorization.

191740013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 191740013 is about 13847.0218097611. The cubic root of 191740013 is about 576.6393173497.

The spelling of 191740013 in words is "one hundred ninety-one million, seven hundred forty thousand, thirteen".