165270013 has 4 divisors (see below), whose sum is σ = 165354208. Its totient is φ = 165185820.

The previous prime is 165269977. The next prime is 165270067. The reversal of 165270013 is 310072561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165270013 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 165270013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165273013) 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, 39081 + ... + 43102.

It is an arithmetic number, because the mean of its divisors is an integer number (41338552).

Almost surely, 2^165270013 is an apocalyptic number.

It is an amenable number.

165270013 is a deficient number, since it is larger than the sum of its proper divisors (84195).

165270013 is an equidigital number, since it uses as much as digits as its factorization.

165270013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84194.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 165270013 is about 12855.7385240989. The cubic root of 165270013 is about 548.7796778625.

The spelling of 165270013 in words is "one hundred sixty-five million, two hundred seventy thousand, thirteen".