23287 has 8 divisors (see below), whose sum is σ = 26640. Its totient is φ = 20160.

The previous prime is 23279. The next prime is 23291. The reversal of 23287 is 78232.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

23287 is an astonishing number since 23287 = 87 + ... + 232.

It is not a de Polignac number, because 23287 - 2³ = 23279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283 + ... + 355.

It is an arithmetic number, because the mean of its divisors is an integer number (3330).

2²³²⁸⁷ is an apocalyptic number.

23287 is a deficient number, since it is larger than the sum of its proper divisors (3353).

23287 is a wasteful number, since it uses less digits than its factorization.

23287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113.

The product of its digits is 672, while the sum is 22.

The square root of 23287 is about 152.6007863676. The cubic root of 23287 is about 28.5564695503.

Subtracting 23287 from its reverse (78232), we obtain a palindrome (54945).

The spelling of 23287 in words is "twenty-three thousand, two hundred eighty-seven".