165346129 has 4 divisors (see below), whose sum is σ = 178065076. Its totient is φ = 152627184.

The previous prime is 165346127. The next prime is 165346147. The reversal of 165346129 is 921643561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 921643561 = 5059 ⋅182179.

It can be written as a sum of positive squares in 2 ways, for example, as 20793600 + 144552529 = 4560^2 + 12023^2 .

It is a cyclic number.

It is not a de Polignac number, because 165346129 - 2¹ = 165346127 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165346121) 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 3 ways as a sum of consecutive naturals, for example, 6359454 + ... + 6359479.

It is an arithmetic number, because the mean of its divisors is an integer number (44516269).

Almost surely, 2^165346129 is an apocalyptic number.

It is an amenable number.

165346129 is a deficient number, since it is larger than the sum of its proper divisors (12718947).

165346129 is a wasteful number, since it uses less digits than its factorization.

165346129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12718946.

The product of its digits is 38880, while the sum is 37.

The square root of 165346129 is about 12858.6985733394. The cubic root of 165346129 is about 548.8639127502.

The spelling of 165346129 in words is "one hundred sixty-five million, three hundred forty-six thousand, one hundred twenty-nine".