23640401 has 2 divisors, whose sum is σ = 23640402. Its totient is φ = 23640400.

The previous prime is 23640371. The next prime is 23640403. The reversal of 23640401 is 10404632.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15523600 + 8116801 = 3940^2 + 2849^2 .

It is a cyclic number.

It is not a de Polignac number, because 23640401 - 2¹⁴ = 23624017 is a prime.

It is a Sophie Germain prime.

Together with 23640403, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (23640403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11820200 + 11820201.

It is an arithmetic number, because the mean of its divisors is an integer number (11820201).

Almost surely, 2^23640401 is an apocalyptic number.

It is an amenable number.

23640401 is a deficient number, since it is larger than the sum of its proper divisors (1).

23640401 is an equidigital number, since it uses as much as digits as its factorization.

23640401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 23640401 is about 4862.1395496222. The cubic root of 23640401 is about 287.0020153071.

The spelling of 23640401 in words is "twenty-three million, six hundred forty thousand, four hundred one".