1987687803 has 8 divisors (see below), whose sum is σ = 2650585600. Its totient is φ = 1324957608.

The previous prime is 1987687783. The next prime is 1987687843. The reversal of 1987687803 is 3087867891.

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

It is not a de Polignac number, because 1987687803 - 2⁸ = 1987687547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1987687843) 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, 10963 + ... + 63996.

It is an arithmetic number, because the mean of its divisors is an integer number (331323200).

Almost surely, 2^1987687803 is an apocalyptic number.

1987687803 is a deficient number, since it is larger than the sum of its proper divisors (662897797).

1987687803 is an equidigital number, since it uses as much as digits as its factorization.

1987687803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83801.

The product of its (nonzero) digits is 4064256, while the sum is 57.

The square root of 1987687803 is about 44583.4924944199. The cubic root of 1987687803 is about 1257.3303269894.

The spelling of 1987687803 in words is "one billion, nine hundred eighty-seven million, six hundred eighty-seven thousand, eight hundred three".