421333903 has 4 divisors (see below), whose sum is σ = 422021848. Its totient is φ = 420645960.

The previous prime is 421333901. The next prime is 421333931. The reversal of 421333903 is 309333124.

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

It is a cyclic number.

It is not a de Polignac number, because 421333903 - 2¹ = 421333901 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 (421333901) 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, 343053 + ... + 344278.

It is an arithmetic number, because the mean of its divisors is an integer number (105505462).

Almost surely, 2^421333903 is an apocalyptic number.

421333903 is a deficient number, since it is larger than the sum of its proper divisors (687945).

421333903 is an equidigital number, since it uses as much as digits as its factorization.

421333903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687944.

The product of its (nonzero) digits is 5832, while the sum is 28.

The square root of 421333903 is about 20526.4196342178. The cubic root of 421333903 is about 749.6792127395.

The spelling of 421333903 in words is "four hundred twenty-one million, three hundred thirty-three thousand, nine hundred three".