23393789 has 2 divisors, whose sum is σ = 23393790. Its totient is φ = 23393788.

The previous prime is 23393779. The next prime is 23393791. The reversal of 23393789 is 98739332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21780889 + 1612900 = 4667^2 + 1270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23393789 is a prime.

It is a Sophie Germain prime.

Together with 23393791, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23393729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11696894 + 11696895.

It is an arithmetic number, because the mean of its divisors is an integer number (11696895).

Almost surely, 2^23393789 is an apocalyptic number.

It is an amenable number.

23393789 is a deficient number, since it is larger than the sum of its proper divisors (1).

23393789 is an equidigital number, since it uses as much as digits as its factorization.

23393789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 44.

The square root of 23393789 is about 4836.7126232597. The cubic root of 23393789 is about 286.0005419978. Note that the first 3 decimals are identical.

The spelling of 23393789 in words is "twenty-three million, three hundred ninety-three thousand, seven hundred eighty-nine".