23423987 has 2 divisors, whose sum is σ = 23423988. Its totient is φ = 23423986.

The previous prime is 23423971. The next prime is 23423989. The reversal of 23423987 is 78932432.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23423987 - 2⁴ = 23423971 is a prime.

Together with 23423989, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23423987.

It is not a weakly prime, because it can be changed into another prime (23423989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11711993 + 11711994.

It is an arithmetic number, because the mean of its divisors is an integer number (11711994).

Almost surely, 2^23423987 is an apocalyptic number.

23423987 is a deficient number, since it is larger than the sum of its proper divisors (1).

23423987 is an equidigital number, since it uses as much as digits as its factorization.

23423987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 38.

The square root of 23423987 is about 4839.8333649001. The cubic root of 23423987 is about 286.1235508701.

The spelling of 23423987 in words is "twenty-three million, four hundred twenty-three thousand, nine hundred eighty-seven".