197156449 has 24 divisors (see below), whose sum is σ = 236575080. Its totient is φ = 163747584.

The previous prime is 197156447. The next prime is 197156459. The reversal of 197156449 is 944651791.

It can be written as a sum of positive squares in 4 ways, for example, as 960400 + 196196049 = 980^2 + 14007^2 .

It is not a de Polignac number, because 197156449 - 2¹ = 197156447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 197156399 and 197156408.

It is not an unprimeable number, because it can be changed into a prime (197156447) 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 in 23 ways as a sum of consecutive naturals, for example, 230707 + ... + 231559.

It is an arithmetic number, because the mean of its divisors is an integer number (9857295).

Almost surely, 2^197156449 is an apocalyptic number.

It is an amenable number.

197156449 is a deficient number, since it is larger than the sum of its proper divisors (39418631).

197156449 is an equidigital number, since it uses as much as digits as its factorization.

197156449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009 (or 1002 counting only the distinct ones).

The product of its digits is 272160, while the sum is 46.

The square root of 197156449 is about 14041.2410064068. The cubic root of 197156449 is about 582.0187767272.

The spelling of 197156449 in words is "one hundred ninety-seven million, one hundred fifty-six thousand, four hundred forty-nine".