165843397 has 4 divisors (see below), whose sum is σ = 171193216. Its totient is φ = 160493580.

The previous prime is 165843383. The next prime is 165843421. The reversal of 165843397 is 793348561.

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.

It is a cyclic number.

It is not a de Polignac number, because 165843397 - 2¹¹ = 165841349 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 (165843497) 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, 2674863 + ... + 2674924.

It is an arithmetic number, because the mean of its divisors is an integer number (42798304).

Almost surely, 2^165843397 is an apocalyptic number.

It is an amenable number.

165843397 is a deficient number, since it is larger than the sum of its proper divisors (5349819).

165843397 is an equidigital number, since it uses as much as digits as its factorization.

165843397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5349818.

The product of its digits is 544320, while the sum is 46.

The square root of 165843397 is about 12878.0199176737. The cubic root of 165843397 is about 549.4135865548.

The spelling of 165843397 in words is "one hundred sixty-five million, eight hundred forty-three thousand, three hundred ninety-seven".