197317028 has 12 divisors (see below), whose sum is σ = 365616972. Its totient is φ = 92855040.

The previous prime is 197317027. The next prime is 197317037. The reversal of 197317028 is 820713791.

It can be written as a sum of positive squares in 2 ways, for example, as 124590244 + 72726784 = 11162^2 + 8528^2 .

It is a junction number, because it is equal to n+sod(n) for n = 197316982 and 197317000.

It is not an unprimeable number, because it can be changed into a prime (197317027) 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 3 ways as a sum of consecutive naturals, for example, 1450793 + ... + 1450928.

It is an arithmetic number, because the mean of its divisors is an integer number (30468081).

Almost surely, 2^197317028 is an apocalyptic number.

It is an amenable number.

197317028 is a deficient number, since it is larger than the sum of its proper divisors (168299944).

197317028 is a wasteful number, since it uses less digits than its factorization.

197317028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2901742 (or 2901740 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 197317028 is about 14046.9579624914. The cubic root of 197317028 is about 582.1767470962.

The spelling of 197317028 in words is "one hundred ninety-seven million, three hundred seventeen thousand, twenty-eight".