839192197 has 2 divisors, whose sum is σ = 839192198. Its totient is φ = 839192196.

The previous prime is 839192173. The next prime is 839192203. The reversal of 839192197 is 791291938.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 838623681 + 568516 = 28959^2 + 754^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-839192197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 839192197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (839192117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419596098 + 419596099.

It is an arithmetic number, because the mean of its divisors is an integer number (419596099).

Almost surely, 2^839192197 is an apocalyptic number.

It is an amenable number.

839192197 is a deficient number, since it is larger than the sum of its proper divisors (1).

839192197 is an equidigital number, since it uses as much as digits as its factorization.

839192197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 49.

The square root of 839192197 is about 28968.8142145998. The cubic root of 839192197 is about 943.2362413304.

The spelling of 839192197 in words is "eight hundred thirty-nine million, one hundred ninety-two thousand, one hundred ninety-seven".