329115961 has 2 divisors, whose sum is σ = 329115962. Its totient is φ = 329115960.

The previous prime is 329115959. The next prime is 329115977. The reversal of 329115961 is 169511923.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 280730025 + 48385936 = 16755^2 + 6956^2 .

It is a cyclic number.

It is not a de Polignac number, because 329115961 - 2¹ = 329115959 is a prime.

Together with 329115959, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 329115961.

It is not a weakly prime, because it can be changed into another prime (329110961) 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, 164557980 + 164557981.

It is an arithmetic number, because the mean of its divisors is an integer number (164557981).

Almost surely, 2^329115961 is an apocalyptic number.

It is an amenable number.

329115961 is a deficient number, since it is larger than the sum of its proper divisors (1).

329115961 is an equidigital number, since it uses as much as digits as its factorization.

329115961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14580, while the sum is 37.

The square root of 329115961 is about 18141.5534340365. The cubic root of 329115961 is about 690.4246919915.

The spelling of 329115961 in words is "three hundred twenty-nine million, one hundred fifteen thousand, nine hundred sixty-one".