23487 has 4 divisors (see below), whose sum is σ = 31320.
Its totient is φ = 15656.
The previous prime is 23473. The next prime is 23497. The reversal of 23487 is 78432.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is not a de Polignac number, because 23487 - 212 = 19391 is a prime.
It is a D-number.
It is a plaindrome in base 8 and base 16.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (23417) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3912 + ... + 3917.
It is an arithmetic number, because the mean of its divisors is an integer number (7830).
223487 is an apocalyptic number.
23487 is a deficient number, since it is larger than the sum of its proper divisors (7833).
23487 is an equidigital number, since it uses as much as digits as its factorization.
23487 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 7832.
The product of its digits is 1344, while the sum is 24.
The square root of 23487 is about 153.2546899772.
The cubic root of 23487 is about 28.6379888677.
Subtracting 23487 from its reverse (78432), we obtain a palindrome (54945).
The spelling of 23487 in words is "twenty-three thousand, four hundred eighty-seven".