23601649 has 2 divisors, whose sum is σ = 23601650. Its totient is φ = 23601648.

The previous prime is 23601647. The next prime is 23601659. The reversal of 23601649 is 94610632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21455424 + 2146225 = 4632^2 + 1465^2 .

It is a cyclic number.

It is not a de Polignac number, because 23601649 - 2¹ = 23601647 is a prime.

Together with 23601647, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 23601649.

It is not a weakly prime, because it can be changed into another prime (23601647) 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, 11800824 + 11800825.

It is an arithmetic number, because the mean of its divisors is an integer number (11800825).

Almost surely, 2^23601649 is an apocalyptic number.

It is an amenable number.

23601649 is a deficient number, since it is larger than the sum of its proper divisors (1).

23601649 is an equidigital number, since it uses as much as digits as its factorization.

23601649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 23601649 is about 4858.1528382709. The cubic root of 23601649 is about 286.8451089903.

The spelling of 23601649 in words is "twenty-three million, six hundred one thousand, six hundred forty-nine".