197274949 has 2 divisors, whose sum is σ = 197274950. Its totient is φ = 197274948.

The previous prime is 197274947. The next prime is 197274971. The reversal of 197274949 is 949472791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187553025 + 9721924 = 13695^2 + 3118^2 .

It is an emirp because it is prime and its reverse (949472791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 197274949 - 2¹ = 197274947 is a prime.

Together with 197274947, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 197274896 and 197274905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197274941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98637474 + 98637475.

It is an arithmetic number, because the mean of its divisors is an integer number (98637475).

Almost surely, 2^197274949 is an apocalyptic number.

It is an amenable number.

197274949 is a deficient number, since it is larger than the sum of its proper divisors (1).

197274949 is an equidigital number, since it uses as much as digits as its factorization.

197274949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 52.

The square root of 197274949 is about 14045.4600850239. The cubic root of 197274949 is about 582.1353599654.

The spelling of 197274949 in words is "one hundred ninety-seven million, two hundred seventy-four thousand, nine hundred forty-nine".