228999593 has 4 divisors (see below), whose sum is σ = 229890900. Its totient is φ = 228108288.

The previous prime is 228999587. The next prime is 228999653. The reversal of 228999593 is 395999822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 395999822 = 2 ⋅197999911.

It can be written as a sum of positive squares in 2 ways, for example, as 207590464 + 21409129 = 14408^2 + 4627^2 .

It is a cyclic number.

It is not a de Polignac number, because 228999593 - 2⁴ = 228999577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228999493) 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, 445268 + ... + 445781.

It is an arithmetic number, because the mean of its divisors is an integer number (57472725).

Almost surely, 2^228999593 is an apocalyptic number.

It is an amenable number.

228999593 is a deficient number, since it is larger than the sum of its proper divisors (891307).

228999593 is an equidigital number, since it uses as much as digits as its factorization.

228999593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891306.

The product of its digits is 3149280, while the sum is 56.

The square root of 228999593 is about 15132.7325027571. The cubic root of 228999593 is about 611.8029548123.

The spelling of 228999593 in words is "two hundred twenty-eight million, nine hundred ninety-nine thousand, five hundred ninety-three".