228472897 has 2 divisors, whose sum is σ = 228472898. Its totient is φ = 228472896.

The previous prime is 228472847. The next prime is 228472901. The reversal of 228472897 is 798274822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201526416 + 26946481 = 14196^2 + 5191^2 .

It is a cyclic number.

It is not a de Polignac number, because 228472897 - 2¹¹ = 228470849 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228472897.

It is not a weakly prime, because it can be changed into another prime (228472847) 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 as a sum of consecutive naturals, namely, 114236448 + 114236449.

It is an arithmetic number, because the mean of its divisors is an integer number (114236449).

Almost surely, 2^228472897 is an apocalyptic number.

It is an amenable number.

228472897 is a deficient number, since it is larger than the sum of its proper divisors (1).

228472897 is an equidigital number, since it uses as much as digits as its factorization.

228472897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 903168, while the sum is 49.

The square root of 228472897 is about 15115.3199436863. The cubic root of 228472897 is about 611.3335485486. Note that the first 3 decimals are identical.

The spelling of 228472897 in words is "two hundred twenty-eight million, four hundred seventy-two thousand, eight hundred ninety-seven".