323271661 has 4 divisors (see below), whose sum is σ = 323920000. Its totient is φ = 322623324.

The previous prime is 323271659. The next prime is 323271703. The reversal of 323271661 is 166172323.

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, and also an emirpimes, since its reverse is a distinct semiprime: 166172323 = 179 ⋅928337.

It is a cyclic number.

It is not a de Polignac number, because 323271661 - 2¹ = 323271659 is a prime.

It is a super-3 number, since 3×323271661³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323271061) 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, 323421 + ... + 324418.

It is an arithmetic number, because the mean of its divisors is an integer number (80980000).

Almost surely, 2^323271661 is an apocalyptic number.

It is an amenable number.

323271661 is a deficient number, since it is larger than the sum of its proper divisors (648339).

323271661 is an equidigital number, since it uses as much as digits as its factorization.

323271661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648338.

The product of its digits is 9072, while the sum is 31.

The square root of 323271661 is about 17979.7569783354. The cubic root of 323271661 is about 686.3135050714.

The spelling of 323271661 in words is "three hundred twenty-three million, two hundred seventy-one thousand, six hundred sixty-one".