2135487809 has 16 divisors (see below), whose sum is σ = 2629498368. Its totient is φ = 1688841792.

The previous prime is 2135487791. The next prime is 2135487811. The reversal of 2135487809 is 9087845312.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2135487809 - 2¹⁶ = 2135422273 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2135487869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 272504 + ... + 280230.

It is an arithmetic number, because the mean of its divisors is an integer number (164343648).

Almost surely, 2^2135487809 is an apocalyptic number.

It is an amenable number.

2135487809 is a deficient number, since it is larger than the sum of its proper divisors (494010559).

2135487809 is a wasteful number, since it uses less digits than its factorization.

2135487809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10784.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 2135487809 is about 46211.3385328752. The cubic root of 2135487809 is about 1287.7523927100.

The spelling of 2135487809 in words is "two billion, one hundred thirty-five million, four hundred eighty-seven thousand, eight hundred nine".