987187331 has 8 divisors (see below), whose sum is σ = 1125661824. Its totient is φ = 857646720.

The previous prime is 987187321. The next prime is 987187363. The reversal of 987187331 is 133781789.

987187331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 987187331 - 2²² = 982993027 is a prime.

It is a super-2 number, since 2×987187331² = 1949077652973807122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (987187321) 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, 2233235 + ... + 2233676.

It is an arithmetic number, because the mean of its divisors is an integer number (140707728).

Almost surely, 2^987187331 is an apocalyptic number.

987187331 is a deficient number, since it is larger than the sum of its proper divisors (138474493).

987187331 is a wasteful number, since it uses less digits than its factorization.

987187331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4466941.

The product of its digits is 254016, while the sum is 47.

The square root of 987187331 is about 31419.5374090708. The cubic root of 987187331 is about 995.7107388766.

The spelling of 987187331 in words is "nine hundred eighty-seven million, one hundred eighty-seven thousand, three hundred thirty-one".