421332309 has 12 divisors (see below), whose sum is σ = 609523200. Its totient is φ = 280458024.

The previous prime is 421332293. The next prime is 421332311. The reversal of 421332309 is 903233124.

It is a happy number.

421332309 is a `hidden beast` number, since 4 + 21 + 332 + 309 = 666.

It is not a de Polignac number, because 421332309 - 2⁴ = 421332293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421332349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29589 + ... + 41450.

It is an arithmetic number, because the mean of its divisors is an integer number (50793600).

Almost surely, 2^421332309 is an apocalyptic number.

It is an amenable number.

421332309 is a deficient number, since it is larger than the sum of its proper divisors (188190891).

421332309 is a wasteful number, since it uses less digits than its factorization.

421332309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71704 (or 71701 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 421332309 is about 20526.3808061723. The cubic root of 421332309 is about 749.6782673372.

The spelling of 421332309 in words is "four hundred twenty-one million, three hundred thirty-two thousand, three hundred nine".