327994661 has 4 divisors (see below), whose sum is σ = 328329312. Its totient is φ = 327660012.

The previous prime is 327994657. The next prime is 327994673. The reversal of 327994661 is 166499723.

It is a happy number.

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: 166499723 = 13 ⋅12807671.

It is a cyclic number.

It is not a de Polignac number, because 327994661 - 2² = 327994657 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 (327994361) 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, 165851 + ... + 167816.

It is an arithmetic number, because the mean of its divisors is an integer number (82082328).

Almost surely, 2^327994661 is an apocalyptic number.

It is an amenable number.

327994661 is a deficient number, since it is larger than the sum of its proper divisors (334651).

327994661 is an equidigital number, since it uses as much as digits as its factorization.

327994661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334650.

The product of its digits is 489888, while the sum is 47.

The square root of 327994661 is about 18110.6228771956. The cubic root of 327994661 is about 689.6397061799.

The spelling of 327994661 in words is "three hundred twenty-seven million, nine hundred ninety-four thousand, six hundred sixty-one".