87319673 has 16 divisors (see below), whose sum is σ = 102110976. Its totient is φ = 73120320.

The previous prime is 87319669. The next prime is 87319679. The reversal of 87319673 is 37691378.

It is not a de Polignac number, because 87319673 - 2² = 87319669 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87319679) 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 15 ways as a sum of consecutive naturals, for example, 138068 + ... + 138698.

It is an arithmetic number, because the mean of its divisors is an integer number (6381936).

Almost surely, 2^87319673 is an apocalyptic number.

It is an amenable number.

87319673 is a deficient number, since it is larger than the sum of its proper divisors (14791303).

87319673 is a wasteful number, since it uses less digits than its factorization.

87319673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064.

The product of its digits is 190512, while the sum is 44.

The square root of 87319673 is about 9344.4996120713. The cubic root of 87319673 is about 443.6468138574.

The spelling of 87319673 in words is "eighty-seven million, three hundred nineteen thousand, six hundred seventy-three".