165544003 has 2 divisors, whose sum is σ = 165544004. Its totient is φ = 165544002.

The previous prime is 165543953. The next prime is 165544021. The reversal of 165544003 is 300445561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165544003 - 2²¹ = 163446851 is a prime.

It is not a weakly prime, because it can be changed into another prime (165544303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82772001 + 82772002.

It is an arithmetic number, because the mean of its divisors is an integer number (82772002).

Almost surely, 2^165544003 is an apocalyptic number.

165544003 is a deficient number, since it is larger than the sum of its proper divisors (1).

165544003 is an equidigital number, since it uses as much as digits as its factorization.

165544003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 165544003 is about 12866.3904417673. The cubic root of 165544003 is about 549.0827720274.

Adding to 165544003 its reverse (300445561), we get a palindrome (465989564).

The spelling of 165544003 in words is "one hundred sixty-five million, five hundred forty-four thousand, three".