197845148712949 has 2 divisors, whose sum is σ = 197845148712950. Its totient is φ = 197845148712948.

The previous prime is 197845148712929. The next prime is 197845148713027. The reversal of 197845148712949 is 949217841548791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118363911912324 + 79481236800625 = 10879518^2 + 8915225^2 .

It is a cyclic number.

It is not a de Polignac number, because 197845148712949 - 2⁷ = 197845148712821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197845148712929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98922574356474 + 98922574356475.

It is an arithmetic number, because the mean of its divisors is an integer number (98922574356475).

Almost surely, 2^{197845148712949} is an apocalyptic number.

It is an amenable number.

197845148712949 is a deficient number, since it is larger than the sum of its proper divisors (1).

197845148712949 is an equidigital number, since it uses as much as digits as its factorization.

197845148712949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1463132160, while the sum is 79.

The spelling of 197845148712949 in words is "one hundred ninety-seven trillion, eight hundred forty-five billion, one hundred forty-eight million, seven hundred twelve thousand, nine hundred forty-nine".