23663393 has 4 divisors (see below), whose sum is σ = 25483668. Its totient is φ = 21843120.

The previous prime is 23663369. The next prime is 23663407. The reversal of 23663393 is 39336632.

It is a happy number.

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 14615329 + 9048064 = 3823^2 + 3008^2 .

It is not a de Polignac number, because 23663393 - 2⁶ = 23663329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23663363) 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, 910118 + ... + 910143.

It is an arithmetic number, because the mean of its divisors is an integer number (6370917).

Almost surely, 2^23663393 is an apocalyptic number.

It is an amenable number.

23663393 is a deficient number, since it is larger than the sum of its proper divisors (1820275).

23663393 is a wasteful number, since it uses less digits than its factorization.

23663393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1820274.

The product of its digits is 52488, while the sum is 35.

The square root of 23663393 is about 4864.5033662235. The cubic root of 23663393 is about 287.0950285663.

The spelling of 23663393 in words is "twenty-three million, six hundred sixty-three thousand, three hundred ninety-three".