222999989 has 2 divisors, whose sum is σ = 222999990. Its totient is φ = 222999988.

The previous prime is 222999923. The next prime is 223000013. The reversal of 222999989 is 989999222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194463025 + 28536964 = 13945^2 + 5342^2 .

It is a cyclic number.

It is not a de Polignac number, because 222999989 - 2²⁴ = 206222773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222999289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111499994 + 111499995.

It is an arithmetic number, because the mean of its divisors is an integer number (111499995).

Almost surely, 2^222999989 is an apocalyptic number.

It is an amenable number.

222999989 is a deficient number, since it is larger than the sum of its proper divisors (1).

222999989 is an equidigital number, since it uses as much as digits as its factorization.

222999989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3779136, while the sum is 59.

The square root of 222999989 is about 14933.1841547608. The cubic root of 222999989 is about 606.4126894798.

The spelling of 222999989 in words is "two hundred twenty-two million, nine hundred ninety-nine thousand, nine hundred eighty-nine".