165495947 has 4 divisors (see below), whose sum is σ = 174206280. Its totient is φ = 156785616.

The previous prime is 165495929. The next prime is 165495973. The reversal of 165495947 is 749594561.

165495947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 749594561 = 1307 ⋅573523.

It is a cyclic number.

It is not a de Polignac number, because 165495947 - 2¹⁴ = 165479563 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165495895 and 165495904.

It is not an unprimeable number, because it can be changed into a prime (165495907) 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, 4355138 + ... + 4355175.

It is an arithmetic number, because the mean of its divisors is an integer number (43551570).

Almost surely, 2^165495947 is an apocalyptic number.

165495947 is a deficient number, since it is larger than the sum of its proper divisors (8710333).

165495947 is an equidigital number, since it uses as much as digits as its factorization.

165495947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8710332.

The product of its digits is 1360800, while the sum is 50.

The square root of 165495947 is about 12864.5228049858. The cubic root of 165495947 is about 549.0296355503.

The spelling of 165495947 in words is "one hundred sixty-five million, four hundred ninety-five thousand, nine hundred forty-seven".