22747289 has 2 divisors, whose sum is σ = 22747290. Its totient is φ = 22747288.

The previous prime is 22747279. The next prime is 22747337. The reversal of 22747289 is 98274722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17707264 + 5040025 = 4208^2 + 2245^2 .

It is a cyclic number.

It is not a de Polignac number, because 22747289 - 2⁸ = 22747033 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22747279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11373644 + 11373645.

It is an arithmetic number, because the mean of its divisors is an integer number (11373645).

Almost surely, 2^22747289 is an apocalyptic number.

It is an amenable number.

22747289 is a deficient number, since it is larger than the sum of its proper divisors (1).

22747289 is an equidigital number, since it uses as much as digits as its factorization.

22747289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 41.

The square root of 22747289 is about 4769.4118085986. The cubic root of 22747289 is about 283.3412997376.

The spelling of 22747289 in words is "twenty-two million, seven hundred forty-seven thousand, two hundred eighty-nine".