197198952479 has 2 divisors, whose sum is σ = 197198952480. Its totient is φ = 197198952478.

The previous prime is 197198952437. The next prime is 197198952481. The reversal of 197198952479 is 974259891791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 197198952479 - 2²⁸ = 196930517023 is a prime.

Together with 197198952481, 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 (197198952499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98599476239 + 98599476240.

It is an arithmetic number, because the mean of its divisors is an integer number (98599476240).

Almost surely, 2^197198952479 is an apocalyptic number.

197198952479 is a deficient number, since it is larger than the sum of its proper divisors (1).

197198952479 is an equidigital number, since it uses as much as digits as its factorization.

197198952479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 102876480, while the sum is 71.

The spelling of 197198952479 in words is "one hundred ninety-seven billion, one hundred ninety-eight million, nine hundred fifty-two thousand, four hundred seventy-nine".