197546881 has 12 divisors (see below), whose sum is σ = 230111508. Its totient is φ = 169096032.

The previous prime is 197546879. The next prime is 197546891. The reversal of 197546881 is 188645791.

It can be written as a sum of positive squares in 2 ways, for example, as 85377600 + 112169281 = 9240^2 + 10591^2 .

It is not a de Polignac number, because 197546881 - 2¹ = 197546879 is a prime.

It is a super-2 number, since 2×197546881² = 78049540385656322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197546831) 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 11 ways as a sum of consecutive naturals, for example, 40675 + ... + 45271.

It is an arithmetic number, because the mean of its divisors is an integer number (19175959).

Almost surely, 2^197546881 is an apocalyptic number.

It is an amenable number.

197546881 is a deficient number, since it is larger than the sum of its proper divisors (32564627).

197546881 is an equidigital number, since it uses as much as digits as its factorization.

197546881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5488 (or 5481 counting only the distinct ones).

The product of its digits is 483840, while the sum is 49.

The square root of 197546881 is about 14055.1371747130. The cubic root of 197546881 is about 582.4027170269.

The spelling of 197546881 in words is "one hundred ninety-seven million, five hundred forty-six thousand, eight hundred eighty-one".