228696917 has 4 divisors (see below), whose sum is σ = 229134720. Its totient is φ = 228259116.

The previous prime is 228696911. The next prime is 228696947. The reversal of 228696917 is 719696822.

It is a happy number.

228696917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 228696917 - 2¹⁴ = 228680533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228696911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218117 + ... + 219162.

It is an arithmetic number, because the mean of its divisors is an integer number (57283680).

Almost surely, 2^228696917 is an apocalyptic number.

It is an amenable number.

228696917 is a deficient number, since it is larger than the sum of its proper divisors (437803).

228696917 is an equidigital number, since it uses as much as digits as its factorization.

228696917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437802.

The product of its digits is 653184, while the sum is 50.

The square root of 228696917 is about 15122.7284905866. The cubic root of 228696917 is about 611.5332895348.

The spelling of 228696917 in words is "two hundred twenty-eight million, six hundred ninety-six thousand, nine hundred seventeen".