223799621 has 2 divisors, whose sum is σ = 223799622. Its totient is φ = 223799620.

The previous prime is 223799617. The next prime is 223799663. The reversal of 223799621 is 126997322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151634596 + 72165025 = 12314^2 + 8495^2 .

It is a cyclic number.

It is not a de Polignac number, because 223799621 - 2² = 223799617 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223796621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111899810 + 111899811.

It is an arithmetic number, because the mean of its divisors is an integer number (111899811).

Almost surely, 2^223799621 is an apocalyptic number.

It is an amenable number.

223799621 is a deficient number, since it is larger than the sum of its proper divisors (1).

223799621 is an equidigital number, since it uses as much as digits as its factorization.

223799621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 41.

The square root of 223799621 is about 14959.9338568057. The cubic root of 223799621 is about 607.1366484862.

The spelling of 223799621 in words is "two hundred twenty-three million, seven hundred ninety-nine thousand, six hundred twenty-one".