329142991 has 2 divisors, whose sum is σ = 329142992. Its totient is φ = 329142990.

The previous prime is 329142977. The next prime is 329143037. The reversal of 329142991 is 199241923.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 329142991 - 2¹¹ = 329140943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (329142901) 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 as a sum of consecutive naturals, namely, 164571495 + 164571496.

It is an arithmetic number, because the mean of its divisors is an integer number (164571496).

Almost surely, 2^329142991 is an apocalyptic number.

329142991 is a deficient number, since it is larger than the sum of its proper divisors (1).

329142991 is an equidigital number, since it uses as much as digits as its factorization.

329142991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 40.

The square root of 329142991 is about 18142.2983935333. The cubic root of 329142991 is about 690.4435927952.

The spelling of 329142991 in words is "three hundred twenty-nine million, one hundred forty-two thousand, nine hundred ninety-one".