222005989 has 2 divisors, whose sum is σ = 222005990. Its totient is φ = 222005988.

The previous prime is 222005983. The next prime is 222006011. The reversal of 222005989 is 989500222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220017889 + 1988100 = 14833^2 + 1410^2 .

It is a cyclic number.

It is not a de Polignac number, because 222005989 - 2³ = 222005981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222005981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111002994 + 111002995.

It is an arithmetic number, because the mean of its divisors is an integer number (111002995).

Almost surely, 2^222005989 is an apocalyptic number.

It is an amenable number.

222005989 is a deficient number, since it is larger than the sum of its proper divisors (1).

222005989 is an equidigital number, since it uses as much as digits as its factorization.

222005989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 222005989 is about 14899.8654020766. The cubic root of 222005989 is about 605.5103396004.

The spelling of 222005989 in words is "two hundred twenty-two million, five thousand, nine hundred eighty-nine".