223943208409 has 2 divisors, whose sum is σ = 223943208410. Its totient is φ = 223943208408.

The previous prime is 223943208361. The next prime is 223943208443. The reversal of 223943208409 is 904802349322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222632985600 + 1310222809 = 471840^2 + 36197^2 .

It is a cyclic number.

It is not a de Polignac number, because 223943208409 - 2¹⁵ = 223943175641 is a prime.

It is a super-2 number, since 2×223943208409² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (223943203409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111971604204 + 111971604205.

It is an arithmetic number, because the mean of its divisors is an integer number (111971604205).

Almost surely, 2^223943208409 is an apocalyptic number.

It is an amenable number.

223943208409 is a deficient number, since it is larger than the sum of its proper divisors (1).

223943208409 is an equidigital number, since it uses as much as digits as its factorization.

223943208409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 746496, while the sum is 46.

The spelling of 223943208409 in words is "two hundred twenty-three billion, nine hundred forty-three million, two hundred eight thousand, four hundred nine".