993328987 has 16 divisors (see below), whose sum is σ = 1196896000. Its totient is φ = 805321440.

The previous prime is 993328981. The next prime is 993329011. The reversal of 993328987 is 789823399.

It is not a de Polignac number, because 993328987 - 2²⁷ = 859111259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (993328981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82264 + ... + 93562.

It is an arithmetic number, because the mean of its divisors is an integer number (74806000).

Almost surely, 2^993328987 is an apocalyptic number.

993328987 is a deficient number, since it is larger than the sum of its proper divisors (203567013).

993328987 is a wasteful number, since it uses less digits than its factorization.

993328987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11986.

The product of its digits is 5878656, while the sum is 58.

The square root of 993328987 is about 31517.1221243311. The cubic root of 993328987 is about 997.7713658797.

The spelling of 993328987 in words is "nine hundred ninety-three million, three hundred twenty-eight thousand, nine hundred eighty-seven".