22727189 has 2 divisors, whose sum is σ = 22727190. Its totient is φ = 22727188.

The previous prime is 22727153. The next prime is 22727191. The reversal of 22727189 is 98172722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21696964 + 1030225 = 4658^2 + 1015^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22727189 is a prime.

Together with 22727191, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22727149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11363594 + 11363595.

It is an arithmetic number, because the mean of its divisors is an integer number (11363595).

Almost surely, 2^22727189 is an apocalyptic number.

It is an amenable number.

22727189 is a deficient number, since it is larger than the sum of its proper divisors (1).

22727189 is an equidigital number, since it uses as much as digits as its factorization.

22727189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 38.

The square root of 22727189 is about 4767.3041648294. The cubic root of 22727189 is about 283.2578196299.

The spelling of 22727189 in words is "twenty-two million, seven hundred twenty-seven thousand, one hundred eighty-nine".