165820927 has 4 divisors (see below), whose sum is σ = 171538920. Its totient is φ = 160102936.

The previous prime is 165820909. The next prime is 165820951. The reversal of 165820927 is 729028561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 729028561 = 17 ⋅42884033.

It is a cyclic number.

It is not a de Polignac number, because 165820927 - 2¹⁵ = 165788159 is a prime.

It is a super-2 number, since 2×165820927² = 54993159662278658, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165820927.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165820957) 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, 2858953 + ... + 2859010.

It is an arithmetic number, because the mean of its divisors is an integer number (42884730).

Almost surely, 2^165820927 is an apocalyptic number.

165820927 is a deficient number, since it is larger than the sum of its proper divisors (5717993).

165820927 is an equidigital number, since it uses as much as digits as its factorization.

165820927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5717992.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 165820927 is about 12877.1474713929. The cubic root of 165820927 is about 549.3887722197.

The spelling of 165820927 in words is "one hundred sixty-five million, eight hundred twenty thousand, nine hundred twenty-seven".