165711713 has 4 divisors (see below), whose sum is σ = 171425940. Its totient is φ = 159997488.

The previous prime is 165711671. The next prime is 165711737. The reversal of 165711713 is 317117561.

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 122257249 + 43454464 = 11057^2 + 6592^2 .

It is a cyclic number.

It is not a de Polignac number, because 165711713 - 2¹⁰ = 165710689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 165711713.

It is not an unprimeable number, because it can be changed into a prime (165711913) 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, 2857070 + ... + 2857127.

It is an arithmetic number, because the mean of its divisors is an integer number (42856485).

Almost surely, 2^165711713 is an apocalyptic number.

It is an amenable number.

165711713 is a deficient number, since it is larger than the sum of its proper divisors (5714227).

165711713 is an equidigital number, since it uses as much as digits as its factorization.

165711713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5714226.

The product of its digits is 4410, while the sum is 32.

The square root of 165711713 is about 12872.9061598382. The cubic root of 165711713 is about 549.2681317914.

The spelling of 165711713 in words is "one hundred sixty-five million, seven hundred eleven thousand, seven hundred thirteen".