197228439 has 10 divisors (see below), whose sum is σ = 294625320. Its totient is φ = 131485572.

The previous prime is 197228429. The next prime is 197228443. The reversal of 197228439 is 934822791.

197228439 is a `hidden beast` number, since 197 + 2 + 28 + 439 = 666.

It is not a de Polignac number, because 197228439 - 2¹² = 197224343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 197228394 and 197228403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197228429) 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 9 ways as a sum of consecutive naturals, for example, 1217379 + ... + 1217540.

It is an arithmetic number, because the mean of its divisors is an integer number (29462532).

Almost surely, 2^197228439 is an apocalyptic number.

197228439 is a deficient number, since it is larger than the sum of its proper divisors (97396881).

197228439 is an equidigital number, since it uses as much as digits as its factorization.

197228439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2434931 (or 2434922 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 197228439 is about 14043.8042922849. The cubic root of 197228439 is about 582.0896078416.

The spelling of 197228439 in words is "one hundred ninety-seven million, two hundred twenty-eight thousand, four hundred thirty-nine".