223998979 has 2 divisors, whose sum is σ = 223998980. Its totient is φ = 223998978.

The previous prime is 223998947. The next prime is 223998991. The reversal of 223998979 is 979899322.

223998979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 223998979 - 2⁵ = 223998947 is a prime.

It is not a weakly prime, because it can be changed into another prime (223998479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111999489 + 111999490.

It is an arithmetic number, because the mean of its divisors is an integer number (111999490).

Almost surely, 2^223998979 is an apocalyptic number.

223998979 is a deficient number, since it is larger than the sum of its proper divisors (1).

223998979 is an equidigital number, since it uses as much as digits as its factorization.

223998979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4408992, while the sum is 58.

The square root of 223998979 is about 14966.5954378409. The cubic root of 223998979 is about 607.3168716483.

The spelling of 223998979 in words is "two hundred twenty-three million, nine hundred ninety-eight thousand, nine hundred seventy-nine".