1987892825 has 12 divisors (see below), whose sum is σ = 2544503808. Its totient is φ = 1539013200.

The previous prime is 1987892801. The next prime is 1987892843. The reversal of 1987892825 is 5282987891.

It is not a de Polignac number, because 1987892825 - 2¹² = 1987888729 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1281737 + ... + 1283286.

It is an arithmetic number, because the mean of its divisors is an integer number (212041984).

Almost surely, 2^1987892825 is an apocalyptic number.

It is an amenable number.

1987892825 is a deficient number, since it is larger than the sum of its proper divisors (556610983).

1987892825 is a wasteful number, since it uses less digits than its factorization.

1987892825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2565064 (or 2565059 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 59.

The square root of 1987892825 is about 44585.7917390731. The cubic root of 1987892825 is about 1257.3735550247.

The spelling of 1987892825 in words is "one billion, nine hundred eighty-seven million, eight hundred ninety-two thousand, eight hundred twenty-five".