165105049 has 4 divisors (see below), whose sum is σ = 167366836. Its totient is φ = 162843264.

The previous prime is 165105047. The next prime is 165105077. The reversal of 165105049 is 940501561.

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 140849424 + 24255625 = 11868^2 + 4925^2 .

It is a cyclic number.

It is not a de Polignac number, because 165105049 - 2¹ = 165105047 is a prime.

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 165105049.

It is not an unprimeable number, because it can be changed into a prime (165105043) 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, 1130784 + ... + 1130929.

It is an arithmetic number, because the mean of its divisors is an integer number (41841709).

Almost surely, 2^165105049 is an apocalyptic number.

It is an amenable number.

165105049 is a deficient number, since it is larger than the sum of its proper divisors (2261787).

165105049 is an equidigital number, since it uses as much as digits as its factorization.

165105049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2261786.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 165105049 is about 12849.3209548209. The cubic root of 165105049 is about 548.5970292253.

The spelling of 165105049 in words is "one hundred sixty-five million, one hundred five thousand, forty-nine".