197987327 has 2 divisors, whose sum is σ = 197987328. Its totient is φ = 197987326.

The previous prime is 197987299. The next prime is 197987329. The reversal of 197987327 is 723789791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 197987327 - 2¹⁴ = 197970943 is a prime.

Together with 197987329, 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 (197987329) 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, 98993663 + 98993664.

It is an arithmetic number, because the mean of its divisors is an integer number (98993664).

Almost surely, 2^197987327 is an apocalyptic number.

197987327 is a deficient number, since it is larger than the sum of its proper divisors (1).

197987327 is an equidigital number, since it uses as much as digits as its factorization.

197987327 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1333584, while the sum is 53.

The square root of 197987327 is about 14070.7969568180. The cubic root of 197987327 is about 582.8352329950.

The spelling of 197987327 in words is "one hundred ninety-seven million, nine hundred eighty-seven thousand, three hundred twenty-seven".