987698018 has 8 divisors (see below), whose sum is σ = 1485416448. Its totient is φ = 492559204.

The previous prime is 987697981. The next prime is 987698027. The reversal of 987698018 is 810896789.

It is a happy number.

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

It is a super-2 number, since 2×987698018² = 1951094749522256648, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 643946 + ... + 645477.

It is an arithmetic number, because the mean of its divisors is an integer number (185677056).

Almost surely, 2^987698018 is an apocalyptic number.

987698018 is a deficient number, since it is larger than the sum of its proper divisors (497718430).

987698018 is a wasteful number, since it uses less digits than its factorization.

987698018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289808.

The product of its (nonzero) digits is 1741824, while the sum is 56.

The square root of 987698018 is about 31427.6632602553. The cubic root of 987698018 is about 995.8824080404.

The spelling of 987698018 in words is "nine hundred eighty-seven million, six hundred ninety-eight thousand, eighteen".