165038497 has 4 divisors (see below), whose sum is σ = 177733780. Its totient is φ = 152343216.

The previous prime is 165038491. The next prime is 165038521. The reversal of 165038497 is 794830561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 95082001 + 69956496 = 9751^2 + 8364^2 .

It is a cyclic number.

It is not a de Polignac number, because 165038497 - 2⁷ = 165038369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165038491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6347622 + ... + 6347647.

It is an arithmetic number, because the mean of its divisors is an integer number (44433445).

Almost surely, 2^165038497 is an apocalyptic number.

It is an amenable number.

165038497 is a deficient number, since it is larger than the sum of its proper divisors (12695283).

165038497 is a wasteful number, since it uses less digits than its factorization.

165038497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12695282.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 165038497 is about 12846.7309849627. The cubic root of 165038497 is about 548.5233082086.

The spelling of 165038497 in words is "one hundred sixty-five million, thirty-eight thousand, four hundred ninety-seven".