22242989 has 2 divisors, whose sum is σ = 22242990. Its totient is φ = 22242988.

The previous prime is 22242967. The next prime is 22243019. The reversal of 22242989 is 98924222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21949225 + 293764 = 4685^2 + 542^2 .

It is a cyclic number.

It is not a de Polignac number, because 22242989 - 2¹⁶ = 22177453 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 (22242929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11121494 + 11121495.

It is an arithmetic number, because the mean of its divisors is an integer number (11121495).

Almost surely, 2^22242989 is an apocalyptic number.

It is an amenable number.

22242989 is a deficient number, since it is larger than the sum of its proper divisors (1).

22242989 is an equidigital number, since it uses as much as digits as its factorization.

22242989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 38.

The square root of 22242989 is about 4716.2473429624. The cubic root of 22242989 is about 281.2317713947.

The spelling of 22242989 in words is "twenty-two million, two hundred forty-two thousand, nine hundred eighty-nine".