186434137 has 4 divisors (see below), whose sum is σ = 196246480. Its totient is φ = 176621796.

The previous prime is 186434077. The next prime is 186434147. The reversal of 186434137 is 731434681.

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: 731434681 = 193 ⋅3789817.

It is a de Polignac number, because none of the positive numbers 2^k-186434137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 186434096 and 186434105.

It is not an unprimeable number, because it can be changed into a prime (186434147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4906143 + ... + 4906180.

It is an arithmetic number, because the mean of its divisors is an integer number (49061620).

Almost surely, 2^186434137 is an apocalyptic number.

It is an amenable number.

186434137 is a deficient number, since it is larger than the sum of its proper divisors (9812343).

186434137 is an equidigital number, since it uses as much as digits as its factorization.

186434137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9812342.

The product of its digits is 48384, while the sum is 37.

The square root of 186434137 is about 13654.0886550513. The cubic root of 186434137 is about 571.2705187611.

The spelling of 186434137 in words is "one hundred eighty-six million, four hundred thirty-four thousand, one hundred thirty-seven".