987766993 has 8 divisors (see below), whose sum is σ = 1052644608. Its totient is φ = 924717024.

The previous prime is 987766991. The next prime is 987767021. The reversal of 987766993 is 399667789.

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

It is not a de Polignac number, because 987766993 - 2¹ = 987766991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (987766991) 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, 455796 + ... + 457957.

It is an arithmetic number, because the mean of its divisors is an integer number (131580576).

Almost surely, 2^987766993 is an apocalyptic number.

It is an amenable number.

987766993 is a deficient number, since it is larger than the sum of its proper divisors (64877615).

987766993 is a wasteful number, since it uses less digits than its factorization.

987766993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913823.

The product of its digits is 30862944, while the sum is 64.

The square root of 987766993 is about 31428.7606023527. The cubic root of 987766993 is about 995.9055896840.

The spelling of 987766993 in words is "nine hundred eighty-seven million, seven hundred sixty-six thousand, nine hundred ninety-three".