421328939 has 8 divisors (see below), whose sum is σ = 424936800. Its totient is φ = 417731776.

The previous prime is 421328903. The next prime is 421328951. The reversal of 421328939 is 939823124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421328939 - 2⁸ = 421328683 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421328896 and 421328905.

It is not an unprimeable number, because it can be changed into a prime (421328989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89642 + ... + 94224.

It is an arithmetic number, because the mean of its divisors is an integer number (53117100).

Almost surely, 2^421328939 is an apocalyptic number.

421328939 is a deficient number, since it is larger than the sum of its proper divisors (3607861).

421328939 is a wasteful number, since it uses less digits than its factorization.

421328939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5349.

The product of its digits is 93312, while the sum is 41.

The square root of 421328939 is about 20526.2987165246. The cubic root of 421328939 is about 749.6762685804.

The spelling of 421328939 in words is "four hundred twenty-one million, three hundred twenty-eight thousand, nine hundred thirty-nine".