327901561 has 4 divisors (see below), whose sum is σ = 353124772. Its totient is φ = 302678352.

The previous prime is 327901537. The next prime is 327901573. The reversal of 327901561 is 165109723.

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

It can be written as a sum of positive squares in 2 ways, for example, as 113103225 + 214798336 = 10635^2 + 14656^2 .

It is a cyclic number.

It is not a de Polignac number, because 327901561 - 2¹⁹ = 327377273 is a prime.

It is a super-3 number, since 3×327901561³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (327901061) 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, 12611586 + ... + 12611611.

It is an arithmetic number, because the mean of its divisors is an integer number (88281193).

Almost surely, 2^327901561 is an apocalyptic number.

It is an amenable number.

327901561 is a deficient number, since it is larger than the sum of its proper divisors (25223211).

327901561 is a wasteful number, since it uses less digits than its factorization.

327901561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25223210.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 327901561 is about 18108.0523800877. The cubic root of 327901561 is about 689.5744494953.

The spelling of 327901561 in words is "three hundred twenty-seven million, nine hundred one thousand, five hundred sixty-one".