191367983 has 2 divisors, whose sum is σ = 191367984. Its totient is φ = 191367982.

The previous prime is 191367971. The next prime is 191368003. The reversal of 191367983 is 389763191.

It is a happy number.

191367983 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 is a cyclic number.

It is not a de Polignac number, because 191367983 - 2¹⁸ = 191105839 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 (191363983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95683991 + 95683992.

It is an arithmetic number, because the mean of its divisors is an integer number (95683992).

Almost surely, 2^191367983 is an apocalyptic number.

191367983 is a deficient number, since it is larger than the sum of its proper divisors (1).

191367983 is an equidigital number, since it uses as much as digits as its factorization.

191367983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 47.

The square root of 191367983 is about 13833.5817126296. The cubic root of 191367983 is about 576.2661279469.

It can be divided in two parts, 1913 and 67983, that added together give a palindrome (69896).

The spelling of 191367983 in words is "one hundred ninety-one million, three hundred sixty-seven thousand, nine hundred eighty-three".