329689427 has 2 divisors, whose sum is σ = 329689428. Its totient is φ = 329689426.

The previous prime is 329689421. The next prime is 329689457. The reversal of 329689427 is 724986923.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 329689427 - 2¹² = 329685331 is a prime.

It is not a weakly prime, because it can be changed into another prime (329689421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164844713 + 164844714.

It is an arithmetic number, because the mean of its divisors is an integer number (164844714).

Almost surely, 2^329689427 is an apocalyptic number.

329689427 is a deficient number, since it is larger than the sum of its proper divisors (1).

329689427 is an equidigital number, since it uses as much as digits as its factorization.

329689427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 50.

The square root of 329689427 is about 18157.3518719003. The cubic root of 329689427 is about 690.8254680003.

The spelling of 329689427 in words is "three hundred twenty-nine million, six hundred eighty-nine thousand, four hundred twenty-seven".