23530289 has 4 divisors (see below), whose sum is σ = 23553024. Its totient is φ = 23507556.

The previous prime is 23530259. The next prime is 23530307. The reversal of 23530289 is 98203532.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23530289 - 2¹² = 23526193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23530259) 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, 9737 + ... + 11910.

It is an arithmetic number, because the mean of its divisors is an integer number (5888256).

Almost surely, 2^23530289 is an apocalyptic number.

It is an amenable number.

23530289 is a deficient number, since it is larger than the sum of its proper divisors (22735).

23530289 is a wasteful number, since it uses less digits than its factorization.

23530289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22734.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 23530289 is about 4850.8029232283. The cubic root of 23530289 is about 286.5557233994. Note that the first 3 decimals are identical.

The spelling of 23530289 in words is "twenty-three million, five hundred thirty thousand, two hundred eighty-nine".