223985691 has 12 divisors (see below), whose sum is σ = 330419232. Its totient is φ = 146146416.

The previous prime is 223985689. The next prime is 223985701. The reversal of 223985691 is 196589322.

It is not a de Polignac number, because 223985691 - 2¹ = 223985689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (223985611) 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 11 ways as a sum of consecutive naturals, for example, 264336 + ... + 265181.

It is an arithmetic number, because the mean of its divisors is an integer number (27534936).

Almost surely, 2^223985691 is an apocalyptic number.

223985691 is a deficient number, since it is larger than the sum of its proper divisors (106433541).

223985691 is a wasteful number, since it uses less digits than its factorization.

223985691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529570 (or 529567 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 223985691 is about 14966.1515093226. The cubic root of 223985691 is about 607.3048623880.

It can be divided in two parts, 223985 and 691, that added together give a square (224676 = 474²).

The spelling of 223985691 in words is "two hundred twenty-three million, nine hundred eighty-five thousand, six hundred ninety-one".