165954963 has 4 divisors (see below), whose sum is σ = 221273288. Its totient is φ = 110636640.

The previous prime is 165954961. The next prime is 165954989. The reversal of 165954963 is 369459561.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 165954963 - 2¹ = 165954961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165954961) 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, 27659158 + ... + 27659163.

It is an arithmetic number, because the mean of its divisors is an integer number (55318322).

Almost surely, 2^165954963 is an apocalyptic number.

165954963 is a deficient number, since it is larger than the sum of its proper divisors (55318325).

165954963 is an equidigital number, since it uses as much as digits as its factorization.

165954963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55318324.

The product of its digits is 874800, while the sum is 48.

The square root of 165954963 is about 12882.3508336018. The cubic root of 165954963 is about 549.5367592536.

The spelling of 165954963 in words is "one hundred sixty-five million, nine hundred fifty-four thousand, nine hundred sixty-three".