2199889 has 2 divisors, whose sum is σ = 2199890. Its totient is φ = 2199888.

The previous prime is 2199859. The next prime is 2199893. The reversal of 2199889 is 9889912.

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., 1404225 + 795664 = 1185^2 + 892^2 .

It is a cyclic number.

It is not a de Polignac number, because 2199889 - 2⁹ = 2199377 is a prime.

It is a super-2 number, since 2×2199889² = 9679023224642, which contains 22 as substring.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (2199859) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1099944 + 1099945.

It is an arithmetic number, because the mean of its divisors is an integer number (1099945).

2^2199889 is an apocalyptic number.

It is an amenable number.

2199889 is a deficient number, since it is larger than the sum of its proper divisors (1).

2199889 is an equidigital number, since it uses as much as digits as its factorization.

2199889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 46.

The square root of 2199889 is about 1483.2022788548. The cubic root of 2199889 is about 130.0569572900.

The spelling of 2199889 in words is "two million, one hundred ninety-nine thousand, eight hundred eighty-nine".