22788709 has 2 divisors, whose sum is σ = 22788710. Its totient is φ = 22788708.

The previous prime is 22788697. The next prime is 22788713. The reversal of 22788709 is 90788722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14250625 + 8538084 = 3775^2 + 2922^2 .

It is a cyclic number.

It is not a de Polignac number, because 22788709 - 2²³ = 14400101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22789709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11394354 + 11394355.

It is an arithmetic number, because the mean of its divisors is an integer number (11394355).

Almost surely, 2^22788709 is an apocalyptic number.

It is an amenable number.

22788709 is a deficient number, since it is larger than the sum of its proper divisors (1).

22788709 is an equidigital number, since it uses as much as digits as its factorization.

22788709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 22788709 is about 4773.7520882425. The cubic root of 22788709 is about 283.5131719486.

The spelling of 22788709 in words is "twenty-two million, seven hundred eighty-eight thousand, seven hundred nine".