197240889 has 4 divisors (see below), whose sum is σ = 262987856. Its totient is φ = 131493924.

The previous prime is 197240833. The next prime is 197240899. The reversal of 197240889 is 988042791.

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 not a de Polignac number, because 197240889 - 2¹¹ = 197238841 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (197240819) 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, 32873479 + ... + 32873484.

It is an arithmetic number, because the mean of its divisors is an integer number (65746964).

Almost surely, 2^197240889 is an apocalyptic number.

It is an amenable number.

197240889 is a deficient number, since it is larger than the sum of its proper divisors (65746967).

197240889 is an equidigital number, since it uses as much as digits as its factorization.

197240889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65746966.

The product of its (nonzero) digits is 290304, while the sum is 48.

The square root of 197240889 is about 14044.2475412533. The cubic root of 197240889 is about 582.1018556750.

The spelling of 197240889 in words is "one hundred ninety-seven million, two hundred forty thousand, eight hundred eighty-nine".