22605109 has 2 divisors, whose sum is σ = 22605110. Its totient is φ = 22605108.

The previous prime is 22605103. The next prime is 22605127. The reversal of 22605109 is 90150622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17556100 + 5049009 = 4190^2 + 2247^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22605109 is a prime.

It is a super-4 number, since 4×22605109⁴ (a number of 31 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22605103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11302554 + 11302555.

It is an arithmetic number, because the mean of its divisors is an integer number (11302555).

Almost surely, 2^22605109 is an apocalyptic number.

It is an amenable number.

22605109 is a deficient number, since it is larger than the sum of its proper divisors (1).

22605109 is an equidigital number, since it uses as much as digits as its factorization.

22605109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 22605109 is about 4754.4830423507. The cubic root of 22605109 is about 282.7497319204.

The spelling of 22605109 in words is "twenty-two million, six hundred five thousand, one hundred nine".