197297999 has 2 divisors, whose sum is σ = 197298000. Its totient is φ = 197297998.

The previous prime is 197297993. The next prime is 197298001. The reversal of 197297999 is 999792791.

It is a strong prime.

It is an emirp because it is prime and its reverse (999792791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 197297999 - 2¹² = 197293903 is a prime.

Together with 197298001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197297993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98648999 + 98649000.

It is an arithmetic number, because the mean of its divisors is an integer number (98649000).

Almost surely, 2^197297999 is an apocalyptic number.

197297999 is a deficient number, since it is larger than the sum of its proper divisors (1).

197297999 is an equidigital number, since it uses as much as digits as its factorization.

197297999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5786802, while the sum is 62.

The square root of 197297999 is about 14046.2806108948. The cubic root of 197297999 is about 582.1580317027.

The spelling of 197297999 in words is "one hundred ninety-seven million, two hundred ninety-seven thousand, nine hundred ninety-nine".