165428167 has 4 divisors (see below), whose sum is σ = 172620720. Its totient is φ = 158235616.

The previous prime is 165428129. The next prime is 165428171. The reversal of 165428167 is 761824561.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165428167 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165428177) 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, 3596242 + ... + 3596287.

It is an arithmetic number, because the mean of its divisors is an integer number (43155180).

Almost surely, 2^165428167 is an apocalyptic number.

165428167 is a deficient number, since it is larger than the sum of its proper divisors (7192553).

165428167 is an equidigital number, since it uses as much as digits as its factorization.

165428167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7192552.

The product of its digits is 80640, while the sum is 40.

The square root of 165428167 is about 12861.8881584315. Note that the first 3 decimals coincide. The cubic root of 165428167 is about 548.9546723647.

The spelling of 165428167 in words is "one hundred sixty-five million, four hundred twenty-eight thousand, one hundred sixty-seven".