404743321 has 4 divisors (see below), whose sum is σ = 405023332. Its totient is φ = 404463312.

The previous prime is 404743319. The next prime is 404743373. The reversal of 404743321 is 123347404.

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

It can be written as a sum of positive squares in 2 ways, for example, as 343731600 + 61011721 = 18540^2 + 7811^2 .

It is a cyclic number.

It is not a de Polignac number, because 404743321 - 2¹ = 404743319 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 404743321.

It is not an unprimeable number, because it can be changed into a prime (404743721) 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, 137826 + ... + 140731.

It is an arithmetic number, because the mean of its divisors is an integer number (101255833).

Almost surely, 2^404743321 is an apocalyptic number.

It is an amenable number.

404743321 is a deficient number, since it is larger than the sum of its proper divisors (280011).

404743321 is a wasteful number, since it uses less digits than its factorization.

404743321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280010.

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 404743321 is about 20118.2335457167. The cubic root of 404743321 is about 739.7072868354.

The spelling of 404743321 in words is "four hundred four million, seven hundred forty-three thousand, three hundred twenty-one".