197082491 has 2 divisors, whose sum is σ = 197082492. Its totient is φ = 197082490.

The previous prime is 197082481. The next prime is 197082493. The reversal of 197082491 is 194280791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 197082491 - 2⁶ = 197082427 is a prime.

Together with 197082493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (197082493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98541245 + 98541246.

It is an arithmetic number, because the mean of its divisors is an integer number (98541246).

Almost surely, 2^197082491 is an apocalyptic number.

197082491 is a deficient number, since it is larger than the sum of its proper divisors (1).

197082491 is an equidigital number, since it uses as much as digits as its factorization.

197082491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 197082491 is about 14038.6071602563. The cubic root of 197082491 is about 581.9459913353.

The spelling of 197082491 in words is "one hundred ninety-seven million, eighty-two thousand, four hundred ninety-one".