197086319 has 2 divisors, whose sum is σ = 197086320. Its totient is φ = 197086318.

The previous prime is 197086301. The next prime is 197086343. The reversal of 197086319 is 913680791.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197086319 is a prime.

It is a super-2 number, since 2×197086319² = 77686034273939522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 197086319.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197086819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98543159 + 98543160.

It is an arithmetic number, because the mean of its divisors is an integer number (98543160).

Almost surely, 2^197086319 is an apocalyptic number.

197086319 is a deficient number, since it is larger than the sum of its proper divisors (1).

197086319 is an equidigital number, since it uses as much as digits as its factorization.

197086319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 197086319 is about 14038.7434979061. The cubic root of 197086319 is about 581.9497590890.

The spelling of 197086319 in words is "one hundred ninety-seven million, eighty-six thousand, three hundred nineteen".