23871487 has 4 divisors (see below), whose sum is σ = 23882320. Its totient is φ = 23860656.

The previous prime is 23871473. The next prime is 23871499. The reversal of 23871487 is 78417832.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 23871487 - 2¹⁵ = 23838719 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 (23871787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 798 + ... + 6955.

It is an arithmetic number, because the mean of its divisors is an integer number (5970580).

Almost surely, 2^23871487 is an apocalyptic number.

23871487 is a deficient number, since it is larger than the sum of its proper divisors (10833).

23871487 is an equidigital number, since it uses as much as digits as its factorization.

23871487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10832.

The product of its digits is 75264, while the sum is 40.

The square root of 23871487 is about 4885.8455767656. The cubic root of 23871487 is about 287.9341372988.

The spelling of 23871487 in words is "twenty-three million, eight hundred seventy-one thousand, four hundred eighty-seven".