191072905013 has 2 divisors, whose sum is σ = 191072905014. Its totient is φ = 191072905012.

The previous prime is 191072904991. The next prime is 191072905043. The reversal of 191072905013 is 310509270191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190272184804 + 800720209 = 436202^2 + 28297^2 .

It is a cyclic number.

It is not a de Polignac number, because 191072905013 - 2⁶ = 191072904949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191072905043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95536452506 + 95536452507.

It is an arithmetic number, because the mean of its divisors is an integer number (95536452507).

Almost surely, 2^191072905013 is an apocalyptic number.

It is an amenable number.

191072905013 is a deficient number, since it is larger than the sum of its proper divisors (1).

191072905013 is an equidigital number, since it uses as much as digits as its factorization.

191072905013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17010, while the sum is 38.

The spelling of 191072905013 in words is "one hundred ninety-one billion, seventy-two million, nine hundred five thousand, thirteen".