4001329 has 4 divisors (see below), whose sum is σ = 4019184. Its totient is φ = 3983476.

The previous prime is 4001303. The next prime is 4001339. The reversal of 4001329 is 9231004.

4001329 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 4001329 - 2¹⁹ = 3477041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4001339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8587 + ... + 9040.

It is an arithmetic number, because the mean of its divisors is an integer number (1004796).

Almost surely, 2^4001329 is an apocalyptic number.

It is an amenable number.

4001329 is a deficient number, since it is larger than the sum of its proper divisors (17855).

4001329 is a wasteful number, since it uses less digits than its factorization.

4001329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17854.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 4001329 is about 2000.3322224071. The cubic root of 4001329 is about 158.7576837168.

The spelling of 4001329 in words is "four million, one thousand, three hundred twenty-nine".