2113136687 has 4 divisors (see below), whose sum is σ = 2132885736. Its totient is φ = 2093387640.

The previous prime is 2113136677. The next prime is 2113136741. The reversal of 2113136687 is 7866313112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2113136687 - 2¹² = 2113132591 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2113136687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113136647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9874364 + ... + 9874577.

It is an arithmetic number, because the mean of its divisors is an integer number (533221434).

Almost surely, 2^2113136687 is an apocalyptic number.

2113136687 is a deficient number, since it is larger than the sum of its proper divisors (19749049).

2113136687 is a wasteful number, since it uses less digits than its factorization.

2113136687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19749048.

The product of its digits is 36288, while the sum is 38.

The square root of 2113136687 is about 45968.8664967932. The cubic root of 2113136687 is about 1283.2438651221.

Adding to 2113136687 its reverse (7866313112), we get a palindrome (9979449799).

The spelling of 2113136687 in words is "two billion, one hundred thirteen million, one hundred thirty-six thousand, six hundred eighty-seven".