186685034989 has 4 divisors (see below), whose sum is σ = 187569798400. Its totient is φ = 185800271580.

The previous prime is 186685034953. The next prime is 186685035001. The reversal of 186685034989 is 989430586681.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 989430586681 = 60223 ⋅16429447.

It is a cyclic number.

It is not a de Polignac number, because 186685034989 - 2²³ = 186676646381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (186685034909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 442381389 + ... + 442381810.

It is an arithmetic number, because the mean of its divisors is an integer number (46892449600).

Almost surely, 2^186685034989 is an apocalyptic number.

It is an amenable number.

186685034989 is a deficient number, since it is larger than the sum of its proper divisors (884763411).

186685034989 is an equidigital number, since it uses as much as digits as its factorization.

186685034989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884763410.

The product of its (nonzero) digits is 89579520, while the sum is 67.

The spelling of 186685034989 in words is "one hundred eighty-six billion, six hundred eighty-five million, thirty-four thousand, nine hundred eighty-nine".