197811449 has 4 divisors (see below), whose sum is σ = 215794320. Its totient is φ = 179828580.

The previous prime is 197811437. The next prime is 197811463. The reversal of 197811449 is 944118791.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 197811449 - 2⁴ = 197811433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197811409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8991419 + ... + 8991440.

It is an arithmetic number, because the mean of its divisors is an integer number (53948580).

Almost surely, 2^197811449 is an apocalyptic number.

It is an amenable number.

197811449 is a deficient number, since it is larger than the sum of its proper divisors (17982871).

197811449 is a wasteful number, since it uses less digits than its factorization.

197811449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17982870.

The product of its digits is 72576, while the sum is 44.

The square root of 197811449 is about 14064.5458156316. The cubic root of 197811449 is about 582.6625986060.

The spelling of 197811449 in words is "one hundred ninety-seven million, eight hundred eleven thousand, four hundred forty-nine".