1987310489 has 16 divisors (see below), whose sum is σ = 2175421248. Its totient is φ = 1808013312.

The previous prime is 1987310477. The next prime is 1987310503. The reversal of 1987310489 is 9840137891.

It is a cyclic number.

It is not a de Polignac number, because 1987310489 - 2¹² = 1987306393 is a prime.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1987310389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56894 + ... + 84920.

It is an arithmetic number, because the mean of its divisors is an integer number (135963828).

Almost surely, 2^1987310489 is an apocalyptic number.

It is an amenable number.

1987310489 is a deficient number, since it is larger than the sum of its proper divisors (188110759).

1987310489 is a wasteful number, since it uses less digits than its factorization.

1987310489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28184.

The product of its (nonzero) digits is 435456, while the sum is 50.

The square root of 1987310489 is about 44579.2607498150. The cubic root of 1987310489 is about 1257.2507641332.

The spelling of 1987310489 in words is "one billion, nine hundred eighty-seven million, three hundred ten thousand, four hundred eighty-nine".