329217961 has 2 divisors, whose sum is σ = 329217962. Its totient is φ = 329217960.

The previous prime is 329217919. The next prime is 329217979. The reversal of 329217961 is 169712923.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 329204736 + 13225 = 18144^2 + 115^2 .

It is a cyclic number.

It is not a de Polignac number, because 329217961 - 2²¹ = 327120809 is a prime.

It is not a weakly prime, because it can be changed into another prime (329217661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164608980 + 164608981.

It is an arithmetic number, because the mean of its divisors is an integer number (164608981).

Almost surely, 2^329217961 is an apocalyptic number.

It is an amenable number.

329217961 is a deficient number, since it is larger than the sum of its proper divisors (1).

329217961 is an equidigital number, since it uses as much as digits as its factorization.

329217961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 40.

The square root of 329217961 is about 18144.3644418866. The cubic root of 329217961 is about 690.4960103645.

The spelling of 329217961 in words is "three hundred twenty-nine million, two hundred seventeen thousand, nine hundred sixty-one".