165396773 has 4 divisors (see below), whose sum is σ = 171100140. Its totient is φ = 159693408.

The previous prime is 165396743. The next prime is 165396797. The reversal of 165396773 is 377693561.

165396773 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.

It can be written as a sum of positive squares in 2 ways, for example, as 135443044 + 29953729 = 11638^2 + 5473^2 .

It is a cyclic number.

It is not a de Polignac number, because 165396773 - 2¹⁶ = 165331237 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 (165396733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2851640 + ... + 2851697.

It is an arithmetic number, because the mean of its divisors is an integer number (42775035).

Almost surely, 2^165396773 is an apocalyptic number.

It is an amenable number.

165396773 is a deficient number, since it is larger than the sum of its proper divisors (5703367).

165396773 is an equidigital number, since it uses as much as digits as its factorization.

165396773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5703366.

The product of its digits is 714420, while the sum is 47.

The square root of 165396773 is about 12860.6676731809. The cubic root of 165396773 is about 548.9199443544.

The spelling of 165396773 in words is "one hundred sixty-five million, three hundred ninety-six thousand, seven hundred seventy-three".