329138917 has 2 divisors, whose sum is σ = 329138918. Its totient is φ = 329138916.

The previous prime is 329138911. The next prime is 329138923. The reversal of 329138917 is 719831923.

It is a balanced prime because it is at equal distance from previous prime (329138911) and next prime (329138923).

It can be written as a sum of positive squares in only one way, i.e., 255968001 + 73170916 = 15999^2 + 8554^2 .

It is an emirp because it is prime and its reverse (719831923) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-329138917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (329138911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164569458 + 164569459.

It is an arithmetic number, because the mean of its divisors is an integer number (164569459).

Almost surely, 2^329138917 is an apocalyptic number.

It is an amenable number.

329138917 is a deficient number, since it is larger than the sum of its proper divisors (1).

329138917 is an equidigital number, since it uses as much as digits as its factorization.

329138917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 43.

The square root of 329138917 is about 18142.1861141374. The cubic root of 329138917 is about 690.4407441054.

The spelling of 329138917 in words is "three hundred twenty-nine million, one hundred thirty-eight thousand, nine hundred seventeen".