22743649 has 2 divisors, whose sum is σ = 22743650. Its totient is φ = 22743648.

The previous prime is 22743607. The next prime is 22743653. The reversal of 22743649 is 94634722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21455424 + 1288225 = 4632^2 + 1135^2 .

It is a cyclic number.

It is not a de Polignac number, because 22743649 - 2⁹ = 22743137 is a prime.

It is not a weakly prime, because it can be changed into another prime (22743349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11371824 + 11371825.

It is an arithmetic number, because the mean of its divisors is an integer number (11371825).

Almost surely, 2^22743649 is an apocalyptic number.

It is an amenable number.

22743649 is a deficient number, since it is larger than the sum of its proper divisors (1).

22743649 is an equidigital number, since it uses as much as digits as its factorization.

22743649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 37.

The square root of 22743649 is about 4769.0301949138. The cubic root of 22743649 is about 283.3261855944.

The spelling of 22743649 in words is "twenty-two million, seven hundred forty-three thousand, six hundred forty-nine".