223556689 has 6 divisors (see below), whose sum is σ = 226947714. Its totient is φ = 220215600.

The previous prime is 223556657. The next prime is 223556693. The reversal of 223556689 is 986655322.

It can be written as a sum of positive squares in only one way, i.e., 179560000 + 43996689 = 13400^2 + 6633^2 .

It is not a de Polignac number, because 223556689 - 2⁵ = 223556657 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (223556629) 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 5 ways as a sum of consecutive naturals, for example, 20412 + ... + 29389.

It is an arithmetic number, because the mean of its divisors is an integer number (37824619).

Almost surely, 2^223556689 is an apocalyptic number.

It is an amenable number.

223556689 is a deficient number, since it is larger than the sum of its proper divisors (3391025).

223556689 is an frugal number, since it uses more digits than its factorization.

223556689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49935 (or 49868 counting only the distinct ones).

The product of its digits is 777600, while the sum is 46.

The square root of 223556689 is about 14951.8122312983. The cubic root of 223556689 is about 606.9168889246.

The spelling of 223556689 in words is "two hundred twenty-three million, five hundred fifty-six thousand, six hundred eighty-nine".