163278971 has 4 divisors (see below), whose sum is σ = 163306152. Its totient is φ = 163251792.

The previous prime is 163278943. The next prime is 163278977. The reversal of 163278971 is 179872361.

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

It is a cyclic number.

It is not a de Polignac number, because 163278971 - 2¹⁴ = 163262587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163278977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146 + ... + 18071.

It is an arithmetic number, because the mean of its divisors is an integer number (40826538).

Almost surely, 2^163278971 is an apocalyptic number.

163278971 is a deficient number, since it is larger than the sum of its proper divisors (27181).

163278971 is an equidigital number, since it uses as much as digits as its factorization.

163278971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27180.

The product of its digits is 127008, while the sum is 44.

The square root of 163278971 is about 12778.0660117249. The cubic root of 163278971 is about 546.5670143971.

The spelling of 163278971 in words is "one hundred sixty-three million, two hundred seventy-eight thousand, nine hundred seventy-one".