1987385559 has 8 divisors (see below), whose sum is σ = 2694760320. Its totient is φ = 1302467256.

The previous prime is 1987385539. The next prime is 1987385563. The reversal of 1987385559 is 9555837891.

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

It is not a de Polignac number, because 1987385559 - 2⁸ = 1987385303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1987385509) 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, 5613907 + ... + 5614260.

It is an arithmetic number, because the mean of its divisors is an integer number (336845040).

Almost surely, 2^1987385559 is an apocalyptic number.

1987385559 is a deficient number, since it is larger than the sum of its proper divisors (707374761).

1987385559 is a wasteful number, since it uses less digits than its factorization.

1987385559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11228229.

The product of its digits is 13608000, while the sum is 60.

The square root of 1987385559 is about 44580.1027253191. The cubic root of 1987385559 is about 1257.2665946786.

The spelling of 1987385559 in words is "one billion, nine hundred eighty-seven million, three hundred eighty-five thousand, five hundred fifty-nine".