87993321 has 32 divisors (see below), whose sum is σ = 129548160. Its totient is φ = 52800000.

The previous prime is 87993277. The next prime is 87993329. The reversal of 87993321 is 12339978.

It is not a de Polignac number, because 87993321 - 2¹¹ = 87991273 is a prime.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (87993329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 350446 + ... + 350696.

It is an arithmetic number, because the mean of its divisors is an integer number (4048380).

Almost surely, 2^87993321 is an apocalyptic number.

It is an amenable number.

87993321 is a deficient number, since it is larger than the sum of its proper divisors (41554839).

87993321 is a wasteful number, since it uses less digits than its factorization.

87993321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457.

The product of its digits is 81648, while the sum is 42.

The square root of 87993321 is about 9380.4755209957. The cubic root of 87993321 is about 444.7847648269.

The spelling of 87993321 in words is "eighty-seven million, nine hundred ninety-three thousand, three hundred twenty-one".