23405623 has 2 divisors, whose sum is σ = 23405624. Its totient is φ = 23405622.

The previous prime is 23405621. The next prime is 23405677. The reversal of 23405623 is 32650432.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23405623 - 2¹ = 23405621 is a prime.

It is a super-3 number, since 3×23405623³ (a number of 23 digits) contains 333 as substring.

Together with 23405621, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23405621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11702811 + 11702812.

It is an arithmetic number, because the mean of its divisors is an integer number (11702812).

Almost surely, 2^23405623 is an apocalyptic number.

23405623 is a deficient number, since it is larger than the sum of its proper divisors (1).

23405623 is an equidigital number, since it uses as much as digits as its factorization.

23405623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 23405623 is about 4837.9358201613. The cubic root of 23405623 is about 286.0487593526.

The spelling of 23405623 in words is "twenty-three million, four hundred five thousand, six hundred twenty-three".