223910989 has 2 divisors, whose sum is σ = 223910990. Its totient is φ = 223910988.

The previous prime is 223910987. The next prime is 223911113. The reversal of 223910989 is 989019322.

223910989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220077225 + 3833764 = 14835^2 + 1958^2 .

It is a cyclic number.

It is not a de Polignac number, because 223910989 - 2¹ = 223910987 is a prime.

It is a super-2 number, since 2×223910989² = 100272261989916242, which contains 22 as substring.

Together with 223910987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223910983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111955494 + 111955495.

It is an arithmetic number, because the mean of its divisors is an integer number (111955495).

Almost surely, 2^223910989 is an apocalyptic number.

It is an amenable number.

223910989 is a deficient number, since it is larger than the sum of its proper divisors (1).

223910989 is an equidigital number, since it uses as much as digits as its factorization.

223910989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 223910989 is about 14963.6556028265. The cubic root of 223910989 is about 607.2373403184.

The spelling of 223910989 in words is "two hundred twenty-three million, nine hundred ten thousand, nine hundred eighty-nine".