1987186122 has 20 divisors (see below), whose sum is σ = 4452769266. Its totient is φ = 662395320.

The previous prime is 1987186109. The next prime is 1987186171. The reversal of 1987186122 is 2216817891.

1987186122 is a `hidden beast` number, since 19 + 8 + 7 + 18 + 612 + 2 = 666.

1987186122 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1707259761 + 279926361 = 41319^2 + 16731^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6133129 + ... + 6133452.

Almost surely, 2^1987186122 is an apocalyptic number.

1987186122 is an abundant number, since it is smaller than the sum of its proper divisors (2465583144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1987186122 is a wasteful number, since it uses less digits than its factorization.

1987186122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12266595 (or 12266586 counting only the distinct ones).

The product of its digits is 96768, while the sum is 45.

The square root of 1987186122 is about 44577.8658304769. The cubic root of 1987186122 is about 1257.2245371012.

The spelling of 1987186122 in words is "one billion, nine hundred eighty-seven million, one hundred eighty-six thousand, one hundred twenty-two".