1987143934 has 8 divisors (see below), whose sum is σ = 2981342448. Its totient is φ = 993363120.

The previous prime is 1987143929. The next prime is 1987143943. The reversal of 1987143934 is 4393417891.

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

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 92247 + ... + 111730.

It is an arithmetic number, because the mean of its divisors is an integer number (372667806).

Almost surely, 2^1987143934 is an apocalyptic number.

1987143934 is a deficient number, since it is larger than the sum of its proper divisors (994198514).

1987143934 is a wasteful number, since it uses less digits than its factorization.

1987143934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208850.

The product of its digits is 653184, while the sum is 49.

The square root of 1987143934 is about 44577.3926334863. The cubic root of 1987143934 is about 1257.2156400711.

The spelling of 1987143934 in words is "one billion, nine hundred eighty-seven million, one hundred forty-three thousand, nine hundred thirty-four".