165410009 has 4 divisors (see below), whose sum is σ = 165470004. Its totient is φ = 165350016.

The previous prime is 165409987. The next prime is 165410033. The reversal of 165410009 is 900014561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 900014561 = 17 ⋅52942033.

It can be written as a sum of positive squares in 2 ways, for example, as 9784384 + 155625625 = 3128^2 + 12475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165410009 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 165410009.

It is not an unprimeable number, because it can be changed into a prime (165410059) 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, 25652 + ... + 31445.

It is an arithmetic number, because the mean of its divisors is an integer number (41367501).

Almost surely, 2^165410009 is an apocalyptic number.

It is an amenable number.

165410009 is a deficient number, since it is larger than the sum of its proper divisors (59995).

165410009 is an equidigital number, since it uses as much as digits as its factorization.

165410009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59994.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 165410009 is about 12861.1822551428. The cubic root of 165410009 is about 548.9345865396.

The spelling of 165410009 in words is "one hundred sixty-five million, four hundred ten thousand, nine".