22986809 has 2 divisors, whose sum is σ = 22986810. Its totient is φ = 22986808.

The previous prime is 22986797. The next prime is 22986823. The reversal of 22986809 is 90868922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22090000 + 896809 = 4700^2 + 947^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22986809 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22986809.

It is not a weakly prime, because it can be changed into another prime (22986869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11493404 + 11493405.

It is an arithmetic number, because the mean of its divisors is an integer number (11493405).

Almost surely, 2^22986809 is an apocalyptic number.

It is an amenable number.

22986809 is a deficient number, since it is larger than the sum of its proper divisors (1).

22986809 is an equidigital number, since it uses as much as digits as its factorization.

22986809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 22986809 is about 4794.4560692533. The cubic root of 22986809 is about 284.3323202704.

The spelling of 22986809 in words is "twenty-two million, nine hundred eighty-six thousand, eight hundred nine".