327661961 has 16 divisors (see below), whose sum is σ = 379157760. Its totient is φ = 279847680.

The previous prime is 327661951. The next prime is 327661963. The reversal of 327661961 is 169166723.

It is a cyclic number.

It is not a de Polignac number, because 327661961 - 2²² = 323467657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (327661963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133235 + ... + 135671.

It is an arithmetic number, because the mean of its divisors is an integer number (23697360).

Almost surely, 2^327661961 is an apocalyptic number.

It is an amenable number.

327661961 is a deficient number, since it is larger than the sum of its proper divisors (51495799).

327661961 is a wasteful number, since it uses less digits than its factorization.

327661961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3184.

The product of its digits is 81648, while the sum is 41.

The square root of 327661961 is about 18101.4353298295. The cubic root of 327661961 is about 689.4064495861.

The spelling of 327661961 in words is "three hundred twenty-seven million, six hundred sixty-one thousand, nine hundred sixty-one".