23008945 has 4 divisors (see below), whose sum is σ = 27610740. Its totient is φ = 18407152.

The previous prime is 23008933. The next prime is 23008949. The reversal of 23008945 is 54980032.

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 2614689 + 20394256 = 1617^2 + 4516^2 .

It is a cyclic number.

It is not a de Polignac number, because 23008945 - 2¹⁷ = 22877873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23008949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2300890 + ... + 2300899.

It is an arithmetic number, because the mean of its divisors is an integer number (6902685).

Almost surely, 2^23008945 is an apocalyptic number.

It is an amenable number.

23008945 is a deficient number, since it is larger than the sum of its proper divisors (4601795).

23008945 is an equidigital number, since it uses as much as digits as its factorization.

23008945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4601794.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 23008945 is about 4796.7640133740. The cubic root of 23008945 is about 284.4235604389.

Adding to 23008945 its reverse (54980032), we get a palindrome (77988977).

The spelling of 23008945 in words is "twenty-three million, eight thousand, nine hundred forty-five".