2221377889 has 2 divisors, whose sum is σ = 2221377890. Its totient is φ = 2221377888.

The previous prime is 2221377863. The next prime is 2221377901. The reversal of 2221377889 is 9887731222.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2205241600 + 16136289 = 46960^2 + 4017^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221377889 - 2¹¹ = 2221375841 is a prime.

It is not a weakly prime, because it can be changed into another prime (2221378889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110688944 + 1110688945.

It is an arithmetic number, because the mean of its divisors is an integer number (1110688945).

Almost surely, 2^2221377889 is an apocalyptic number.

It is an amenable number.

2221377889 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221377889 is an equidigital number, since it uses as much as digits as its factorization.

2221377889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 49.

The square root of 2221377889 is about 47131.4957220753. The cubic root of 2221377889 is about 1304.7905868129.

The spelling of 2221377889 in words is "two billion, two hundred twenty-one million, three hundred seventy-seven thousand, eight hundred eighty-nine".