87321117 has 24 divisors (see below), whose sum is σ = 130442400. Its totient is φ = 51874368.

The previous prime is 87321109. The next prime is 87321139. The reversal of 87321117 is 71112378.

It is not a de Polignac number, because 87321117 - 2³ = 87321109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87321217) 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 23 ways as a sum of consecutive naturals, for example, 11734 + ... + 17672.

It is an arithmetic number, because the mean of its divisors is an integer number (5435100).

Almost surely, 2^87321117 is an apocalyptic number.

87321117 is a gapful number since it is divisible by the number (87) formed by its first and last digit.

It is an amenable number.

87321117 is a deficient number, since it is larger than the sum of its proper divisors (43121283).

87321117 is a wasteful number, since it uses less digits than its factorization.

87321117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5997 (or 5984 counting only the distinct ones).

The product of its digits is 2352, while the sum is 30.

The square root of 87321117 is about 9344.5768764562. The cubic root of 87321117 is about 443.6492593638.

The spelling of 87321117 in words is "eighty-seven million, three hundred twenty-one thousand, one hundred seventeen".