165001623 has 16 divisors (see below), whose sum is σ = 227798016. Its totient is φ = 106125120.

The previous prime is 165001601. The next prime is 165001649. The reversal of 165001623 is 326100561.

It is not a de Polignac number, because 165001623 - 2²⁰ = 163953047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165001593 and 165001602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165001423) 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, 29715 + ... + 34827.

It is an arithmetic number, because the mean of its divisors is an integer number (14237376).

Almost surely, 2^165001623 is an apocalyptic number.

165001623 is a deficient number, since it is larger than the sum of its proper divisors (62796393).

165001623 is a wasteful number, since it uses less digits than its factorization.

165001623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5494.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 165001623 is about 12845.2957536991. The cubic root of 165001623 is about 548.4824535891.

The spelling of 165001623 in words is "one hundred sixty-five million, one thousand, six hundred twenty-three".