329139421 has 4 divisors (see below), whose sum is σ = 354457852. Its totient is φ = 303820992.

The previous prime is 329139403. The next prime is 329139463. The reversal of 329139421 is 124931923.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 210656196 + 118483225 = 14514^2 + 10885^2 .

It is a cyclic number.

It is not a de Polignac number, because 329139421 - 2¹¹ = 329137373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (329139401) 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, 12659196 + ... + 12659221.

It is an arithmetic number, because the mean of its divisors is an integer number (88614463).

Almost surely, 2^329139421 is an apocalyptic number.

It is an amenable number.

329139421 is a deficient number, since it is larger than the sum of its proper divisors (25318431).

329139421 is a wasteful number, since it uses less digits than its factorization.

329139421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25318430.

The product of its digits is 11664, while the sum is 34.

The square root of 329139421 is about 18142.2000044096. The cubic root of 329139421 is about 690.4410965219.

The spelling of 329139421 in words is "three hundred twenty-nine million, one hundred thirty-nine thousand, four hundred twenty-one".