404879393 has 4 divisors (see below), whose sum is σ = 406181568. Its totient is φ = 403577220.

The previous prime is 404879381. The next prime is 404879441. The reversal of 404879393 is 393978404.

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 404879393 - 2¹² = 404875297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (404879323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 650621 + ... + 651242.

It is an arithmetic number, because the mean of its divisors is an integer number (101545392).

Almost surely, 2^404879393 is an apocalyptic number.

It is an amenable number.

404879393 is a deficient number, since it is larger than the sum of its proper divisors (1302175).

404879393 is a wasteful number, since it uses less digits than its factorization.

404879393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302174.

The product of its (nonzero) digits is 653184, while the sum is 47.

The square root of 404879393 is about 20121.6150693725. The cubic root of 404879393 is about 739.7901724300.

The spelling of 404879393 in words is "four hundred four million, eight hundred seventy-nine thousand, three hundred ninety-three".