87321081 has 8 divisors (see below), whose sum is σ = 116774944. Its totient is φ = 58040640.

The previous prime is 87321043. The next prime is 87321109. The reversal of 87321081 is 18012378.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87321081 - 2⁷ = 87320953 is a prime.

It is a super-2 number, since 2×87321081² = 15249942374017122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87321011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42175 + ... + 44196.

It is an arithmetic number, because the mean of its divisors is an integer number (14596868).

Almost surely, 2^87321081 is an apocalyptic number.

It is an amenable number.

87321081 is a deficient number, since it is larger than the sum of its proper divisors (29453863).

87321081 is a wasteful number, since it uses less digits than its factorization.

87321081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86711.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 87321081 is about 9344.5749502051. The cubic root of 87321081 is about 443.6491983959.

The spelling of 87321081 in words is "eighty-seven million, three hundred twenty-one thousand, eighty-one".