163891201 has 12 divisors (see below), whose sum is σ = 169183740. Its totient is φ = 158708160.

The previous prime is 163891183. The next prime is 163891249. The reversal of 163891201 is 102198361.

It can be written as a sum of positive squares in 6 ways, for example, as 26532801 + 137358400 = 5151^2 + 11720^2 .

It is not a de Polignac number, because 163891201 - 2¹¹ = 163889153 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163891001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1043815 + ... + 1043971.

It is an arithmetic number, because the mean of its divisors is an integer number (14098645).

Almost surely, 2^163891201 is an apocalyptic number.

It is an amenable number.

163891201 is a deficient number, since it is larger than the sum of its proper divisors (5292539).

163891201 is an equidigital number, since it uses as much as digits as its factorization.

163891201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 163891201 is about 12801.9998828308. Note that the first 3 decimals coincide. The cubic root of 163891201 is about 547.2492973114.

The spelling of 163891201 in words is "one hundred sixty-three million, eight hundred ninety-one thousand, two hundred one".