165173434 has 4 divisors (see below), whose sum is σ = 247760154. Its totient is φ = 82586716.

The previous prime is 165173429. The next prime is 165173471. The reversal of 165173434 is 434371561.

165173434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 434371561 = 13 ⋅33413197.

It can be written as a sum of positive squares in only one way, i.e., 149940025 + 15233409 = 12245^2 + 3903^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 165173434.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41293357 + ... + 41293360.

Almost surely, 2^165173434 is an apocalyptic number.

165173434 is a deficient number, since it is larger than the sum of its proper divisors (82586720).

165173434 is an equidigital number, since it uses as much as digits as its factorization.

165173434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82586719.

The product of its digits is 30240, while the sum is 34.

The square root of 165173434 is about 12851.9817148952. The cubic root of 165173434 is about 548.6727600599.

The spelling of 165173434 in words is "one hundred sixty-five million, one hundred seventy-three thousand, four hundred thirty-four".