23681393 has 2 divisors, whose sum is σ = 23681394. Its totient is φ = 23681392.

The previous prime is 23681389. The next prime is 23681401. The reversal of 23681393 is 39318632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21687649 + 1993744 = 4657^2 + 1412^2 .

It is a cyclic number.

It is not a de Polignac number, because 23681393 - 2² = 23681389 is a prime.

It is not a weakly prime, because it can be changed into another prime (23681363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11840696 + 11840697.

It is an arithmetic number, because the mean of its divisors is an integer number (11840697).

Almost surely, 2^23681393 is an apocalyptic number.

It is an amenable number.

23681393 is a deficient number, since it is larger than the sum of its proper divisors (1).

23681393 is an equidigital number, since it uses as much as digits as its factorization.

23681393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 35.

The square root of 23681393 is about 4866.3531520020. The cubic root of 23681393 is about 287.1678048410.

The spelling of 23681393 in words is "twenty-three million, six hundred eighty-one thousand, three hundred ninety-three".