87987143873 has 4 divisors (see below), whose sum is σ = 87987752580. Its totient is φ = 87986535168.

The previous prime is 87987143869. The next prime is 87987143903. The reversal of 87987143873 is 37834178978.

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 can be written as a sum of positive squares in 2 ways, for example, as 1470569104 + 86516574769 = 38348^2 + 294137^2 .

It is a cyclic number.

It is not a de Polignac number, because 87987143873 - 2² = 87987143869 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87987143813) 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, 49961 + ... + 422457.

It is an arithmetic number, because the mean of its divisors is an integer number (21996938145).

Almost surely, 2^87987143873 is an apocalyptic number.

It is an amenable number.

87987143873 is a deficient number, since it is larger than the sum of its proper divisors (608707).

87987143873 is a wasteful number, since it uses less digits than its factorization.

87987143873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608706.

The product of its digits is 56899584, while the sum is 65.

The spelling of 87987143873 in words is "eighty-seven billion, nine hundred eighty-seven million, one hundred forty-three thousand, eight hundred seventy-three".