421423333 has 4 divisors (see below), whose sum is σ = 424214368. Its totient is φ = 418632300.

The previous prime is 421423313. The next prime is 421423339. The reversal of 421423333 is 333324124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421423333 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421423298 and 421423307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421423339) 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, 1395291 + ... + 1395592.

It is an arithmetic number, because the mean of its divisors is an integer number (106053592).

Almost surely, 2^421423333 is an apocalyptic number.

It is an amenable number.

421423333 is a deficient number, since it is larger than the sum of its proper divisors (2791035).

421423333 is a wasteful number, since it uses less digits than its factorization.

421423333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2791034.

The product of its digits is 5184, while the sum is 25.

The square root of 421423333 is about 20528.5979306917. The cubic root of 421423333 is about 749.7322499060.

Adding to 421423333 its reverse (333324124), we get a palindrome (754747457).

The spelling of 421423333 in words is "four hundred twenty-one million, four hundred twenty-three thousand, three hundred thirty-three".