197474881 has 4 divisors (see below), whose sum is σ = 197829972. Its totient is φ = 197119792.

The previous prime is 197474861. The next prime is 197474899. The reversal of 197474881 is 188474791.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 80640400 + 116834481 = 8980^2 + 10809^2 .

It is a cyclic number.

It is not a de Polignac number, because 197474881 - 2²³ = 189086273 is a prime.

It is a super-2 number, since 2×197474881² = 77992657251928322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197474861) 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, 176710 + ... + 177823.

It is an arithmetic number, because the mean of its divisors is an integer number (49457493).

Almost surely, 2^197474881 is an apocalyptic number.

It is an amenable number.

197474881 is a deficient number, since it is larger than the sum of its proper divisors (355091).

197474881 is an equidigital number, since it uses as much as digits as its factorization.

197474881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355090.

The product of its digits is 451584, while the sum is 49.

The square root of 197474881 is about 14052.5756002236. The cubic root of 197474881 is about 582.3319522361.

The spelling of 197474881 in words is "one hundred ninety-seven million, four hundred seventy-four thousand, eight hundred eighty-one".