23981623 has 2 divisors, whose sum is σ = 23981624. Its totient is φ = 23981622.

The previous prime is 23981621. The next prime is 23981641. The reversal of 23981623 is 32618932.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23981623 - 2¹ = 23981621 is a prime.

It is a super-3 number, since 3×23981623³ (a number of 23 digits) contains 333 as substring.

Together with 23981621, 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 (23981621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11990811 + 11990812.

It is an arithmetic number, because the mean of its divisors is an integer number (11990812).

Almost surely, 2^23981623 is an apocalyptic number.

23981623 is a deficient number, since it is larger than the sum of its proper divisors (1).

23981623 is an equidigital number, since it uses as much as digits as its factorization.

23981623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 34.

The square root of 23981623 is about 4897.1035316807. The cubic root of 23981623 is about 288.3762724280.

The spelling of 23981623 in words is "twenty-three million, nine hundred eighty-one thousand, six hundred twenty-three".