23663257 has 4 divisors (see below), whose sum is σ = 23766820. Its totient is φ = 23559696.

The previous prime is 23663249. The next prime is 23663293. The reversal of 23663257 is 75236632.

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 21864976 + 1798281 = 4676^2 + 1341^2 .

It is a cyclic number.

It is not a de Polignac number, because 23663257 - 2³ = 23663249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23663207) by changing a digit.

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, 51438 + ... + 51895.

It is an arithmetic number, because the mean of its divisors is an integer number (5941705).

Almost surely, 2^23663257 is an apocalyptic number.

It is an amenable number.

23663257 is a deficient number, since it is larger than the sum of its proper divisors (103563).

23663257 is a wasteful number, since it uses less digits than its factorization.

23663257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103562.

The product of its digits is 45360, while the sum is 34.

The square root of 23663257 is about 4864.4893873869. The cubic root of 23663257 is about 287.0944785607.

Adding to 23663257 its reverse (75236632), we get a palindrome (98899889).

The spelling of 23663257 in words is "twenty-three million, six hundred sixty-three thousand, two hundred fifty-seven".