197649883 has 2 divisors, whose sum is σ = 197649884. Its totient is φ = 197649882.

The previous prime is 197649857. The next prime is 197649901. The reversal of 197649883 is 388946791.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197649883 is a prime.

It is not a weakly prime, because it can be changed into another prime (197649083) 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, 98824941 + 98824942.

It is an arithmetic number, because the mean of its divisors is an integer number (98824942).

Almost surely, 2^197649883 is an apocalyptic number.

197649883 is a deficient number, since it is larger than the sum of its proper divisors (1).

197649883 is an equidigital number, since it uses as much as digits as its factorization.

197649883 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 55.

The square root of 197649883 is about 14058.8009090391. The cubic root of 197649883 is about 582.5039220695.

The spelling of 197649883 in words is "one hundred ninety-seven million, six hundred forty-nine thousand, eight hundred eighty-three".