23906945 has 4 divisors (see below), whose sum is σ = 28688340. Its totient is φ = 19125552.

The previous prime is 23906929. The next prime is 23906951. The reversal of 23906945 is 54960932.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8288641 + 15618304 = 2879^2 + 3952^2 .

It is a cyclic number.

It is not a de Polignac number, because 23906945 - 2⁴ = 23906929 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23906899 and 23906908.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2390690 + ... + 2390699.

It is an arithmetic number, because the mean of its divisors is an integer number (7172085).

Almost surely, 2^23906945 is an apocalyptic number.

It is an amenable number.

23906945 is a deficient number, since it is larger than the sum of its proper divisors (4781395).

23906945 is an equidigital number, since it uses as much as digits as its factorization.

23906945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4781394.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 23906945 is about 4889.4728754744. The cubic root of 23906945 is about 288.0766297182.

The spelling of 23906945 in words is "twenty-three million, nine hundred six thousand, nine hundred forty-five".