22065689 has 2 divisors, whose sum is σ = 22065690. Its totient is φ = 22065688.

The previous prime is 22065629. The next prime is 22065697. The reversal of 22065689 is 98656022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12250000 + 9815689 = 3500^2 + 3133^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22065689 is a prime.

It is a super-3 number, since 3×22065689³ (a number of 23 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (22065619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11032844 + 11032845.

It is an arithmetic number, because the mean of its divisors is an integer number (11032845).

Almost surely, 2^22065689 is an apocalyptic number.

It is an amenable number.

22065689 is a deficient number, since it is larger than the sum of its proper divisors (1).

22065689 is an equidigital number, since it uses as much as digits as its factorization.

22065689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 22065689 is about 4697.4130114351. The cubic root of 22065689 is about 280.4825395338.

The spelling of 22065689 in words is "twenty-two million, sixty-five thousand, six hundred eighty-nine".