165922289 has 8 divisors (see below), whose sum is σ = 178787112. Its totient is φ = 153072000.

The previous prime is 165922279. The next prime is 165922291. The reversal of 165922289 is 982229561.

It can be written as a sum of positive squares in 4 ways, for example, as 27889 + 165894400 = 167^2 + 12880^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165922289 - 2⁸ = 165922033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165922249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36887 + ... + 41139.

It is an arithmetic number, because the mean of its divisors is an integer number (22348389).

Almost surely, 2^165922289 is an apocalyptic number.

It is an amenable number.

165922289 is a deficient number, since it is larger than the sum of its proper divisors (12864823).

165922289 is a wasteful number, since it uses less digits than its factorization.

165922289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7267.

The product of its digits is 155520, while the sum is 44.

The square root of 165922289 is about 12881.0826020176. The cubic root of 165922289 is about 549.5006917522.

It can be divided in two parts, 16592 and 2289, that added together give a palindrome (18881).

The spelling of 165922289 in words is "one hundred sixty-five million, nine hundred twenty-two thousand, two hundred eighty-nine".