23720789 has 2 divisors, whose sum is σ = 23720790. Its totient is φ = 23720788.

The previous prime is 23720761. The next prime is 23720791. The reversal of 23720789 is 98702732.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14822500 + 8898289 = 3850^2 + 2983^2 .

It is a cyclic number.

It is not a de Polignac number, because 23720789 - 2⁸ = 23720533 is a prime.

Together with 23720791, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23722789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11860394 + 11860395.

It is an arithmetic number, because the mean of its divisors is an integer number (11860395).

Almost surely, 2^23720789 is an apocalyptic number.

It is an amenable number.

23720789 is a deficient number, since it is larger than the sum of its proper divisors (1).

23720789 is an equidigital number, since it uses as much as digits as its factorization.

23720789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 23720789 is about 4870.3992649474. The cubic root of 23720789 is about 287.3269592610.

The spelling of 23720789 in words is "twenty-three million, seven hundred twenty thousand, seven hundred eighty-nine".