191797339 has 2 divisors, whose sum is σ = 191797340. Its totient is φ = 191797338.

The previous prime is 191797297. The next prime is 191797351. The reversal of 191797339 is 933797191.

It is a strong prime.

It is an emirp because it is prime and its reverse (933797191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 191797339 - 2⁷ = 191797211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 191797292 and 191797301.

It is not a weakly prime, because it can be changed into another prime (191797379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95898669 + 95898670.

It is an arithmetic number, because the mean of its divisors is an integer number (95898670).

Almost surely, 2^191797339 is an apocalyptic number.

191797339 is a deficient number, since it is larger than the sum of its proper divisors (1).

191797339 is an equidigital number, since it uses as much as digits as its factorization.

191797339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 321489, while the sum is 49.

The square root of 191797339 is about 13849.0916308616. The cubic root of 191797339 is about 576.6967790677.

The spelling of 191797339 in words is "one hundred ninety-one million, seven hundred ninety-seven thousand, three hundred thirty-nine".