421323806 has 4 divisors (see below), whose sum is σ = 631985712. Its totient is φ = 210661902.

The previous prime is 421323797. The next prime is 421323811. The reversal of 421323806 is 608323124.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105330950 + ... + 105330953.

It is an arithmetic number, because the mean of its divisors is an integer number (157996428).

Almost surely, 2^421323806 is an apocalyptic number.

421323806 is a deficient number, since it is larger than the sum of its proper divisors (210661906).

421323806 is a wasteful number, since it uses less digits than its factorization.

421323806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210661905.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 421323806 is about 20526.1736814244. The cubic root of 421323806 is about 749.6732241626.

The spelling of 421323806 in words is "four hundred twenty-one million, three hundred twenty-three thousand, eight hundred six".