23981287 has 8 divisors (see below), whose sum is σ = 27538560. Its totient is φ = 20653560.

The previous prime is 23981263. The next prime is 23981297. The reversal of 23981287 is 78218932.

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

It is a cyclic number.

It is not a de Polignac number, because 23981287 - 2¹¹ = 23979239 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 (23981207) 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 in 7 ways as a sum of consecutive naturals, for example, 57163 + ... + 57580.

It is an arithmetic number, because the mean of its divisors is an integer number (3442320).

Almost surely, 2^23981287 is an apocalyptic number.

23981287 is a deficient number, since it is larger than the sum of its proper divisors (3557273).

23981287 is a wasteful number, since it uses less digits than its factorization.

23981287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114773.

The product of its digits is 48384, while the sum is 40.

The square root of 23981287 is about 4897.0692255675. The cubic root of 23981287 is about 288.3749256345.

The spelling of 23981287 in words is "twenty-three million, nine hundred eighty-one thousand, two hundred eighty-seven".