329894561 has 2 divisors, whose sum is σ = 329894562. Its totient is φ = 329894560.

The previous prime is 329894531. The next prime is 329894597. The reversal of 329894561 is 165498923.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 259854400 + 70040161 = 16120^2 + 8369^2 .

It is a cyclic number.

It is not a de Polignac number, because 329894561 - 2¹⁴ = 329878177 is a prime.

It is a Chen prime.

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

It is not a weakly prime, because it can be changed into another prime (329894531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164947280 + 164947281.

It is an arithmetic number, because the mean of its divisors is an integer number (164947281).

Almost surely, 2^329894561 is an apocalyptic number.

It is an amenable number.

329894561 is a deficient number, since it is larger than the sum of its proper divisors (1).

329894561 is an equidigital number, since it uses as much as digits as its factorization.

329894561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 47.

The square root of 329894561 is about 18162.9997797721. Note that the first 3 decimals coincide. The cubic root of 329894561 is about 690.9687163617.

The spelling of 329894561 in words is "three hundred twenty-nine million, eight hundred ninety-four thousand, five hundred sixty-one".