163472891 has 8 divisors (see below), whose sum is σ = 171216384. Its totient is φ = 155782440.

The previous prime is 163472879. The next prime is 163472917. The reversal of 163472891 is 198274361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163472891 - 2¹⁴ = 163456507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163472821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6881 + ... + 19346.

It is an arithmetic number, because the mean of its divisors is an integer number (21402048).

Almost surely, 2^163472891 is an apocalyptic number.

163472891 is a deficient number, since it is larger than the sum of its proper divisors (7743493).

163472891 is a wasteful number, since it uses less digits than its factorization.

163472891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26521.

The product of its digits is 72576, while the sum is 41.

The square root of 163472891 is about 12785.6517628160. The cubic root of 163472891 is about 546.7833074941.

The spelling of 163472891 in words is "one hundred sixty-three million, four hundred seventy-two thousand, eight hundred ninety-one".