1987185135 has 16 divisors (see below), whose sum is σ = 3424073184. Its totient is φ = 978306432.

The previous prime is 1987185121. The next prime is 1987185139. The reversal of 1987185135 is 5315817891.

It is a happy number.

It is not a de Polignac number, because 1987185135 - 2⁹ = 1987184623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1987185139) 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, 5095152 + ... + 5095541.

It is an arithmetic number, because the mean of its divisors is an integer number (214004574).

Almost surely, 2^1987185135 is an apocalyptic number.

1987185135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1987185135 is a deficient number, since it is larger than the sum of its proper divisors (1436888049).

1987185135 is a wasteful number, since it uses less digits than its factorization.

1987185135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10190714.

The product of its digits is 302400, while the sum is 48.

The square root of 1987185135 is about 44577.8547599590. The cubic root of 1987185135 is about 1257.2243289541.

The spelling of 1987185135 in words is "one billion, nine hundred eighty-seven million, one hundred eighty-five thousand, one hundred thirty-five".