23687 has 2 divisors, whose sum is σ = 23688. Its totient is φ = 23686.

The previous prime is 23677. The next prime is 23689. The reversal of 23687 is 78632.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23687 - 2⁴ = 23671 is a prime.

It is a super-2 number, since 2×23687² = 1122147938, which contains 22 as substring.

Together with 23689, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 14.

It is a nialpdrome in base 13.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 23687.

It is not a weakly prime, because it can be changed into another prime (23689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11843 + 11844.

It is an arithmetic number, because the mean of its divisors is an integer number (11844).

2²³⁶⁸⁷ is an apocalyptic number.

23687 is a deficient number, since it is larger than the sum of its proper divisors (1).

23687 is an equidigital number, since it uses as much as digits as its factorization.

23687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 26.

The square root of 23687 is about 153.9058153547. The cubic root of 23687 is about 28.7190467117.

Subtracting 23687 from its reverse (78632), we obtain a palindrome (54945).

It can be divided in two parts, 236 and 87, that added together give a palindrome (323).

The spelling of 23687 in words is "twenty-three thousand, six hundred eighty-seven".