329945421 has 16 divisors (see below), whose sum is σ = 474521600. Its totient is φ = 202720320.

The previous prime is 329945417. The next prime is 329945437. The reversal of 329945421 is 124549923.

It is not a de Polignac number, because 329945421 - 2² = 329945417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 329945421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (329945471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19380 + ... + 32178.

It is an arithmetic number, because the mean of its divisors is an integer number (29657600).

Almost surely, 2^329945421 is an apocalyptic number.

It is an amenable number.

329945421 is a deficient number, since it is larger than the sum of its proper divisors (144576179).

329945421 is a wasteful number, since it uses less digits than its factorization.

329945421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13476.

The product of its digits is 77760, while the sum is 39.

The square root of 329945421 is about 18164.3998249323. The cubic root of 329945421 is about 691.0042235279.

The spelling of 329945421 in words is "three hundred twenty-nine million, nine hundred forty-five thousand, four hundred twenty-one".