191873113 has 2 divisors, whose sum is σ = 191873114. Its totient is φ = 191873112.

The previous prime is 191873047. The next prime is 191873117. The reversal of 191873113 is 311378191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144648729 + 47224384 = 12027^2 + 6872^2 .

It is a cyclic number.

It is not a de Polignac number, because 191873113 - 2²⁵ = 158318681 is a prime.

It is not a weakly prime, because it can be changed into another prime (191873117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95936556 + 95936557.

It is an arithmetic number, because the mean of its divisors is an integer number (95936557).

Almost surely, 2^191873113 is an apocalyptic number.

It is an amenable number.

191873113 is a deficient number, since it is larger than the sum of its proper divisors (1).

191873113 is an equidigital number, since it uses as much as digits as its factorization.

191873113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 34.

The square root of 191873113 is about 13851.8270636043. The cubic root of 191873113 is about 576.7727148940.

The spelling of 191873113 in words is "one hundred ninety-one million, eight hundred seventy-three thousand, one hundred thirteen".