22189877 has 2 divisors, whose sum is σ = 22189878. Its totient is φ = 22189876.

The previous prime is 22189861. The next prime is 22189919. The reversal of 22189877 is 77898122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12666481 + 9523396 = 3559^2 + 3086^2 .

It is a cyclic number.

It is not a de Polignac number, because 22189877 - 2⁴ = 22189861 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22189837) 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, 11094938 + 11094939.

It is an arithmetic number, because the mean of its divisors is an integer number (11094939).

Almost surely, 2^22189877 is an apocalyptic number.

It is an amenable number.

22189877 is a deficient number, since it is larger than the sum of its proper divisors (1).

22189877 is an equidigital number, since it uses as much as digits as its factorization.

22189877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 44.

The square root of 22189877 is about 4710.6132297186. The cubic root of 22189877 is about 281.0077504479.

The spelling of 22189877 in words is "twenty-two million, one hundred eighty-nine thousand, eight hundred seventy-seven".