23645389 has 2 divisors, whose sum is σ = 23645390. Its totient is φ = 23645388.

The previous prime is 23645387. The next prime is 23645417. The reversal of 23645389 is 98354632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17682025 + 5963364 = 4205^2 + 2442^2 .

It is a cyclic number.

It is not a de Polignac number, because 23645389 - 2¹ = 23645387 is a prime.

It is a super-2 number, since 2×23645389² = 1118208841922642, which contains 22 as substring.

Together with 23645387, it forms a pair of twin primes.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23645381) 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, 11822694 + 11822695.

It is an arithmetic number, because the mean of its divisors is an integer number (11822695).

Almost surely, 2^23645389 is an apocalyptic number.

It is an amenable number.

23645389 is a deficient number, since it is larger than the sum of its proper divisors (1).

23645389 is an equidigital number, since it uses as much as digits as its factorization.

23645389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 40.

The square root of 23645389 is about 4862.6524654760. The cubic root of 23645389 is about 287.0221991918.

The spelling of 23645389 in words is "twenty-three million, six hundred forty-five thousand, three hundred eighty-nine".