422813 has 4 divisors (see below), whose sum is σ = 424128. Its totient is φ = 421500.

The previous prime is 422803. The next prime is 422827. The reversal of 422813 is 318224.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 422813 - 2⁴ = 422797 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 (422803) 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, 188 + ... + 938.

It is an arithmetic number, because the mean of its divisors is an integer number (106032).

2⁴²²⁸¹³ is an apocalyptic number.

It is an amenable number.

422813 is a deficient number, since it is larger than the sum of its proper divisors (1315).

422813 is an equidigital number, since it uses as much as digits as its factorization.

422813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314.

The product of its digits is 384, while the sum is 20.

The square root of 422813 is about 650.2407246551. The cubic root of 422813 is about 75.0555440398.

The spelling of 422813 in words is "four hundred twenty-two thousand, eight hundred thirteen".