23220649 has 2 divisors, whose sum is σ = 23220650. Its totient is φ = 23220648.

The previous prime is 23220601. The next prime is 23220653. The reversal of 23220649 is 94602232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19079424 + 4141225 = 4368^2 + 2035^2 .

It is a cyclic number.

It is not a de Polignac number, because 23220649 - 2¹⁹ = 22696361 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23220049) 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, 11610324 + 11610325.

It is an arithmetic number, because the mean of its divisors is an integer number (11610325).

Almost surely, 2^23220649 is an apocalyptic number.

It is an amenable number.

23220649 is a deficient number, since it is larger than the sum of its proper divisors (1).

23220649 is an equidigital number, since it uses as much as digits as its factorization.

23220649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 23220649 is about 4818.7808624174. The cubic root of 23220649 is about 285.2932203281.

The spelling of 23220649 in words is "twenty-three million, two hundred twenty thousand, six hundred forty-nine".