22401889 has 2 divisors, whose sum is σ = 22401890. Its totient is φ = 22401888.

The previous prime is 22401853. The next prime is 22401947. The reversal of 22401889 is 98810422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14745600 + 7656289 = 3840^2 + 2767^2 .

It is a cyclic number.

It is not a de Polignac number, because 22401889 - 2⁹ = 22401377 is a prime.

It is not a weakly prime, because it can be changed into another prime (22401089) 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, 11200944 + 11200945.

It is an arithmetic number, because the mean of its divisors is an integer number (11200945).

Almost surely, 2^22401889 is an apocalyptic number.

It is an amenable number.

22401889 is a deficient number, since it is larger than the sum of its proper divisors (1).

22401889 is an equidigital number, since it uses as much as digits as its factorization.

22401889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 22401889 is about 4733.0633843210. The cubic root of 22401889 is about 281.8998730761.

The spelling of 22401889 in words is "twenty-two million, four hundred one thousand, eight hundred eighty-nine".