165173963 has 4 divisors (see below), whose sum is σ = 165271008. Its totient is φ = 165076920.

The previous prime is 165173959. The next prime is 165173977. The reversal of 165173963 is 369371561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 369371561 = 13 ⋅28413197.

It is a cyclic number.

It is not a de Polignac number, because 165173963 - 2² = 165173959 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 165173963.

It is not an unprimeable number, because it can be changed into a prime (165173923) 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, 45923 + ... + 49388.

It is an arithmetic number, because the mean of its divisors is an integer number (41317752).

Almost surely, 2^165173963 is an apocalyptic number.

165173963 is a deficient number, since it is larger than the sum of its proper divisors (97045).

165173963 is an equidigital number, since it uses as much as digits as its factorization.

165173963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97044.

The product of its digits is 102060, while the sum is 41.

The square root of 165173963 is about 12852.0022953624. The cubic root of 165173963 is about 548.6733458030.

The spelling of 165173963 in words is "one hundred sixty-five million, one hundred seventy-three thousand, nine hundred sixty-three".