87339421673 has 24 divisors (see below), whose sum is σ = 108048880800. Its totient is φ = 70191007488.

The previous prime is 87339421651. The next prime is 87339421681. The reversal of 87339421673 is 37612493378.

It is a de Polignac number, because none of the positive numbers 2^k-87339421673 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87339421613) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 393263 + ... + 573876.

It is an arithmetic number, because the mean of its divisors is an integer number (4502036700).

Almost surely, 2^87339421673 is an apocalyptic number.

It is an amenable number.

87339421673 is a deficient number, since it is larger than the sum of its proper divisors (20709459127).

87339421673 is a wasteful number, since it uses less digits than its factorization.

87339421673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967269 (or 967262 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 53.

The spelling of 87339421673 in words is "eighty-seven billion, three hundred thirty-nine million, four hundred twenty-one thousand, six hundred seventy-three".