197849761 has 2 divisors, whose sum is σ = 197849762. Its totient is φ = 197849760.

The previous prime is 197849747. The next prime is 197849797. The reversal of 197849761 is 167948791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146870161 + 50979600 = 12119^2 + 7140^2 .

It is a cyclic number.

It is not a de Polignac number, because 197849761 - 2¹⁹ = 197325473 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 197849699 and 197849708.

It is not a weakly prime, because it can be changed into another prime (197849711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98924880 + 98924881.

It is an arithmetic number, because the mean of its divisors is an integer number (98924881).

Almost surely, 2^197849761 is an apocalyptic number.

It is an amenable number.

197849761 is a deficient number, since it is larger than the sum of its proper divisors (1).

197849761 is an equidigital number, since it uses as much as digits as its factorization.

197849761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 52.

The square root of 197849761 is about 14065.9077559893. The cubic root of 197849761 is about 582.7002127559.

The spelling of 197849761 in words is "one hundred ninety-seven million, eight hundred forty-nine thousand, seven hundred sixty-one".