23730389 has 2 divisors, whose sum is σ = 23730390. Its totient is φ = 23730388.

The previous prime is 23730359. The next prime is 23730391. The reversal of 23730389 is 98303732.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16467364 + 7263025 = 4058^2 + 2695^2 .

It is a cyclic number.

It is not a de Polignac number, because 23730389 - 2¹² = 23726293 is a prime.

It is a Sophie Germain prime.

Together with 23730391, 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 (23730359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11865194 + 11865195.

It is an arithmetic number, because the mean of its divisors is an integer number (11865195).

Almost surely, 2^23730389 is an apocalyptic number.

It is an amenable number.

23730389 is a deficient number, since it is larger than the sum of its proper divisors (1).

23730389 is an equidigital number, since it uses as much as digits as its factorization.

23730389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 23730389 is about 4871.3847107368. The cubic root of 23730389 is about 287.3657152342.

The spelling of 23730389 in words is "twenty-three million, seven hundred thirty thousand, three hundred eighty-nine".