22289887 has 2 divisors, whose sum is σ = 22289888. Its totient is φ = 22289886.

The previous prime is 22289879. The next prime is 22289903. The reversal of 22289887 is 78898222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22289887 - 2³ = 22289879 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 (22289807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11144943 + 11144944.

It is an arithmetic number, because the mean of its divisors is an integer number (11144944).

Almost surely, 2^22289887 is an apocalyptic number.

22289887 is a deficient number, since it is larger than the sum of its proper divisors (1).

22289887 is an equidigital number, since it uses as much as digits as its factorization.

22289887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 46.

The square root of 22289887 is about 4721.2166864062. The cubic root of 22289887 is about 281.4292860499.

It can be divided in two parts, 222 and 89887, that added together give a palindrome (90109).

The spelling of 22289887 in words is "twenty-two million, two hundred eighty-nine thousand, eight hundred eighty-seven".