23289505 has 4 divisors (see below), whose sum is σ = 27947412. Its totient is φ = 18631600.

The previous prime is 23289499. The next prime is 23289521. The reversal of 23289505 is 50598232.

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 3655744 + 19633761 = 1912^2 + 4431^2 .

It is not a de Polignac number, because 23289505 - 2¹¹ = 23287457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 2328946 + ... + 2328955.

It is an arithmetic number, because the mean of its divisors is an integer number (6986853).

Almost surely, 2^23289505 is an apocalyptic number.

It is an amenable number.

23289505 is a deficient number, since it is larger than the sum of its proper divisors (4657907).

23289505 is an equidigital number, since it uses as much as digits as its factorization.

23289505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4657906.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 23289505 is about 4825.9201195213. The cubic root of 23289505 is about 285.5749346050.

The spelling of 23289505 in words is "twenty-three million, two hundred eighty-nine thousand, five hundred five".