404020679 has 4 divisors (see below), whose sum is σ = 404061576. Its totient is φ = 403979784.

The previous prime is 404020651. The next prime is 404020699. The reversal of 404020679 is 976020404.

It is a semiprime because it is the product of two primes, 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 404020679 - 2²⁴ = 387243463 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 (404020699) 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, 4592 + ... + 28794.

It is an arithmetic number, because the mean of its divisors is an integer number (101015394).

Almost surely, 2^404020679 is an apocalyptic number.

404020679 is a deficient number, since it is larger than the sum of its proper divisors (40897).

404020679 is a wasteful number, since it uses less digits than its factorization.

404020679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40896.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 404020679 is about 20100.2656450108. The cubic root of 404020679 is about 739.2667920231.

The spelling of 404020679 in words is "four hundred four million, twenty thousand, six hundred seventy-nine".