197431814889 has 27 divisors (see below), whose sum is σ = 293168385783. Its totient is φ = 128031887952.

The previous prime is 197431814887. The next prime is 197431814897. The reversal of 197431814889 is 988418134791.

The square root of 197431814889 is 444333.

It is a perfect power (a square), and thus also a powerful number.

197431814889 is a `hidden beast` number, since 1 + 9 + 7 + 431 + 81 + 48 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 176664699225 + 20767115664 = 420315^2 + 144108^2 .

It is not a de Polignac number, because 197431814889 - 2¹ = 197431814887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (197431814887) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 49318962 + ... + 49322964.

Almost surely, 2^197431814889 is an apocalyptic number.

197431814889 is the 444333-rd square number.

197431814889 is the 222167-th centered octagonal number.

It is an amenable number.

197431814889 is a deficient number, since it is larger than the sum of its proper divisors (95736570894).

197431814889 is an frugal number, since it uses more digits than its factorization.

197431814889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8086 (or 4043 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 63.

The spelling of 197431814889 in words is "one hundred ninety-seven billion, four hundred thirty-one million, eight hundred fourteen thousand, eight hundred eighty-nine".