330403421 has 4 divisors (see below), whose sum is σ = 333674844. Its totient is φ = 327132000.

The previous prime is 330403397. The next prime is 330403429. The reversal of 330403421 is 124304033.

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 207504025 + 122899396 = 14405^2 + 11086^2 .

It is a cyclic number.

It is not a de Polignac number, because 330403421 - 2¹⁴ = 330387037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 330403393 and 330403402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (330403429) 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, 1635560 + ... + 1635761.

It is an arithmetic number, because the mean of its divisors is an integer number (83418711).

Almost surely, 2^330403421 is an apocalyptic number.

It is an amenable number.

330403421 is a deficient number, since it is larger than the sum of its proper divisors (3271423).

330403421 is a wasteful number, since it uses less digits than its factorization.

330403421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3271422.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 330403421 is about 18177.0025306705. The cubic root of 330403421 is about 691.3238052839.

Adding to 330403421 its reverse (124304033), we get a palindrome (454707454).

The spelling of 330403421 in words is "three hundred thirty million, four hundred three thousand, four hundred twenty-one".