87192326673 has 6 divisors (see below), whose sum is σ = 125944471874. Its totient is φ = 58128217776.

The previous prime is 87192326569. The next prime is 87192326687. The reversal of 87192326673 is 37662329178.

It can be written as a sum of positive squares in only one way, i.e., 47936037249 + 39256289424 = 218943^2 + 198132^2 .

It is a de Polignac number, because none of the positive numbers 2^k-87192326673 is a prime.

It is a super-2 number, since 2×87192326673² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87192326693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4844018140 + ... + 4844018157.

Almost surely, 2^87192326673 is an apocalyptic number.

It is an amenable number.

87192326673 is a deficient number, since it is larger than the sum of its proper divisors (38752145201).

87192326673 is a wasteful number, since it uses less digits than its factorization.

87192326673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9688036303 (or 9688036300 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 54.

The spelling of 87192326673 in words is "eighty-seven billion, one hundred ninety-two million, three hundred twenty-six thousand, six hundred seventy-three".