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329 = 747

329 has 4 divisors (see below), whose sum is σ = 384. Its totient is φ = 276.

The previous prime is 317. The next prime is 331. The reversal of 329 is 923.

329 = T6 + T7 + ... + T12.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 923 = 1371.

It is a cyclic number.

It is not a de Polignac number, because 329 - 24 = 313 is a prime.

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

It is a Duffinian number.

Its product of digits (54) is a multiple of the sum of its prime divisors (54).

It is a Curzon number.

It is a plaindrome in base 11, base 12, base 15 and base 16.

It is a nialpdrome in base 7 and base 8.

It is not an unprimeable number, because it can be changed into a prime (349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17 + ... + 30.

It is an arithmetic number, because the mean of its divisors is an integer number (96).

It is an amenable number.

329 is a deficient number, since it is larger than the sum of its proper divisors (55).

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

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

The sum of its prime factors is 54.

The product of its digits is 54, while the sum is 14.

The square root of 329 is about 18.1383571472. The cubic root of 329 is about 6.9034359419.

Adding to 329 its sum of digits (14), we get a palindrome (343).

Adding to 329 its product of digits (54), we get a palindrome (383).

Multiplying 329 by its product of digits (54), we get a triangular number (17766 = T188).

It can be divided in two parts, 3 and 29, that added together give a 5-th power (32 = 25).

The spelling of 329 in words is "three hundred twenty-nine", and thus it is an aban number and an oban number.

Divisors: 1 7 47 329