165883623 has 16 divisors (see below), whose sum is σ = 233126400. Its totient is φ = 104630400.

The previous prime is 165883621. The next prime is 165883631. The reversal of 165883623 is 326388561.

It is not a de Polignac number, because 165883623 - 2¹ = 165883621 is a prime.

It is a super-2 number, since 2×165883623² = 55034752759212258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165883621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57823 + ... + 60623.

It is an arithmetic number, because the mean of its divisors is an integer number (14570400).

Almost surely, 2^165883623 is an apocalyptic number.

165883623 is a deficient number, since it is larger than the sum of its proper divisors (67242777).

165883623 is a wasteful number, since it uses less digits than its factorization.

165883623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3862.

The product of its digits is 207360, while the sum is 42.

The square root of 165883623 is about 12879.5816314040. The cubic root of 165883623 is about 549.4580038076.

The spelling of 165883623 in words is "one hundred sixty-five million, eight hundred eighty-three thousand, six hundred twenty-three".