165568097 has 4 divisors (see below), whose sum is σ = 165783060. Its totient is φ = 165353136.

The previous prime is 165568087. The next prime is 165568111. The reversal of 165568097 is 790865561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 790865561 = 12107 ⋅65323.

It can be written as a sum of positive squares in 2 ways, for example, as 47389456 + 118178641 = 6884^2 + 10871^2 .

It is a cyclic number.

It is not a de Polignac number, because 165568097 - 2²⁰ = 164519521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165568037) 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, 106322 + ... + 107867.

It is an arithmetic number, because the mean of its divisors is an integer number (41445765).

Almost surely, 2^165568097 is an apocalyptic number.

It is an amenable number.

165568097 is a deficient number, since it is larger than the sum of its proper divisors (214963).

165568097 is an equidigital number, since it uses as much as digits as its factorization.

165568097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214962.

The product of its (nonzero) digits is 453600, while the sum is 47.

The square root of 165568097 is about 12867.3267231387. The cubic root of 165568097 is about 549.1094093731.

The spelling of 165568097 in words is "one hundred sixty-five million, five hundred sixty-eight thousand, ninety-seven".