327872161 has 4 divisors (see below), whose sum is σ = 331822512. Its totient is φ = 323921812.

The previous prime is 327872137. The next prime is 327872191. The reversal of 327872161 is 161278723.

327872161 = T₁₄₇₈₃ + T₁₄₇₈₄ + T₁₄₇₈₅.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 327872161 - 2¹¹ = 327870113 is a prime.

It is an alternating number because its digits alternate between odd and even.

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 327872161.

It is not an unprimeable number, because it can be changed into a prime (327872131) 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, 1975051 + ... + 1975216.

It is an arithmetic number, because the mean of its divisors is an integer number (82955628).

Almost surely, 2^327872161 is an apocalyptic number.

327872161 is the 14785-th centered triangular number.

It is an amenable number.

327872161 is a deficient number, since it is larger than the sum of its proper divisors (3950351).

327872161 is an equidigital number, since it uses as much as digits as its factorization.

327872161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3950350.

The product of its digits is 28224, while the sum is 37.

The square root of 327872161 is about 18107.2405683472. The cubic root of 327872161 is about 689.5538395550.

It can be divided in two parts, 32 and 7872161, that multiplied together give a palindrome (251909152).

The spelling of 327872161 in words is "three hundred twenty-seven million, eight hundred seventy-two thousand, one hundred sixty-one".