987981895 has 12 divisors (see below), whose sum is σ = 1195084584. Its totient is φ = 784098000.

The previous prime is 987981887. The next prime is 987981913. The reversal of 987981895 is 598189789.

It is not a de Polignac number, because 987981895 - 2³ = 987981887 is a prime.

It is a super-2 number, since 2×987981895² = 1952216449695582050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74520 + ... + 86770.

It is an arithmetic number, because the mean of its divisors is an integer number (99590382).

Almost surely, 2^987981895 is an apocalyptic number.

987981895 is a deficient number, since it is larger than the sum of its proper divisors (207102689).

987981895 is a wasteful number, since it uses less digits than its factorization.

987981895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12510 (or 12383 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 64.

The square root of 987981895 is about 31432.1792912932. The cubic root of 987981895 is about 995.9778086673.

The spelling of 987981895 in words is "nine hundred eighty-seven million, nine hundred eighty-one thousand, eight hundred ninety-five".