404023213 has 4 divisors (see below), whose sum is σ = 440752608. Its totient is φ = 367293820.

The previous prime is 404023177. The next prime is 404023229. The reversal of 404023213 is 312320404.

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 not a de Polignac number, because 404023213 - 2¹³ = 404015021 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 (404023013) 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, 18364681 + ... + 18364702.

It is an arithmetic number, because the mean of its divisors is an integer number (110188152).

Almost surely, 2^404023213 is an apocalyptic number.

It is an amenable number.

404023213 is a deficient number, since it is larger than the sum of its proper divisors (36729395).

404023213 is a wasteful number, since it uses less digits than its factorization.

404023213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36729394.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 404023213 is about 20100.3286789047. The cubic root of 404023213 is about 739.2683375696.

Adding to 404023213 its reverse (312320404), we get a palindrome (716343617).

The spelling of 404023213 in words is "four hundred four million, twenty-three thousand, two hundred thirteen".