987678199 has 4 divisors (see below), whose sum is σ = 991323040. Its totient is φ = 984033360.

The previous prime is 987678191. The next prime is 987678217. The reversal of 987678199 is 991876789.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 991876789 = 59 ⋅16811471.

It is a cyclic number.

It is not a de Polignac number, because 987678199 - 2³ = 987678191 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 987678199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987678191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1822014 + ... + 1822555.

It is an arithmetic number, because the mean of its divisors is an integer number (247830760).

Almost surely, 2^987678199 is an apocalyptic number.

987678199 is a deficient number, since it is larger than the sum of its proper divisors (3644841).

987678199 is a wasteful number, since it uses less digits than its factorization.

987678199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3644840.

The product of its digits is 13716864, while the sum is 64.

The square root of 987678199 is about 31427.3479472895. The cubic root of 987678199 is about 995.8757469203.

The spelling of 987678199 in words is "nine hundred eighty-seven million, six hundred seventy-eight thousand, one hundred ninety-nine".