223797809 has 4 divisors (see below), whose sum is σ = 236962404. Its totient is φ = 210633216.

The previous prime is 223797767. The next prime is 223797811. The reversal of 223797809 is 908797322.

223797809 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.

It can be written as a sum of positive squares in 2 ways, for example, as 127757809 + 96040000 = 11303^2 + 9800^2 .

It is a cyclic number.

It is not a de Polignac number, because 223797809 - 2¹⁶ = 223732273 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 (223797829) 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, 6582272 + ... + 6582305.

It is an arithmetic number, because the mean of its divisors is an integer number (59240601).

Almost surely, 2^223797809 is an apocalyptic number.

It is an amenable number.

223797809 is a deficient number, since it is larger than the sum of its proper divisors (13164595).

223797809 is a wasteful number, since it uses less digits than its factorization.

223797809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13164594.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 223797809 is about 14959.8732949180. The cubic root of 223797809 is about 607.1350099154.

The spelling of 223797809 in words is "two hundred twenty-three million, seven hundred ninety-seven thousand, eight hundred nine".