987966693 has 128 divisors (see below), whose sum is σ = 1866240000. Its totient is φ = 503822592.

The previous prime is 987966689. The next prime is 987966697. The reversal of 987966693 is 396669789.

It is an interprime number because it is at equal distance from previous prime (987966689) and next prime (987966697).

It is not a de Polignac number, because 987966693 - 2² = 987966689 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 987966693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987966697) 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 127 ways as a sum of consecutive naturals, for example, 5519278 + ... + 5519456.

It is an arithmetic number, because the mean of its divisors is an integer number (14580000).

Almost surely, 2^987966693 is an apocalyptic number.

It is an amenable number.

987966693 is a deficient number, since it is larger than the sum of its proper divisors (878273307).

987966693 is a wasteful number, since it uses less digits than its factorization.

987966693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296 (or 290 counting only the distinct ones).

The product of its digits is 26453952, while the sum is 63.

The square root of 987966693 is about 31431.9374681231. The cubic root of 987966693 is about 995.9727002969.

The spelling of 987966693 in words is "nine hundred eighty-seven million, nine hundred sixty-six thousand, six hundred ninety-three".