191116493 has 2 divisors, whose sum is σ = 191116494. Its totient is φ = 191116492.

The previous prime is 191116487. The next prime is 191116511. The reversal of 191116493 is 394611191.

191116493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115304644 + 75811849 = 10738^2 + 8707^2 .

It is a cyclic number.

It is not a de Polignac number, because 191116493 - 2¹⁴ = 191100109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191118493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95558246 + 95558247.

It is an arithmetic number, because the mean of its divisors is an integer number (95558247).

Almost surely, 2^191116493 is an apocalyptic number.

It is an amenable number.

191116493 is a deficient number, since it is larger than the sum of its proper divisors (1).

191116493 is an equidigital number, since it uses as much as digits as its factorization.

191116493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 35.

The square root of 191116493 is about 13824.4888874779. The cubic root of 191116493 is about 576.0135801277.

The spelling of 191116493 in words is "one hundred ninety-one million, one hundred sixteen thousand, four hundred ninety-three".