404842593 has 4 divisors (see below), whose sum is σ = 539790128. Its totient is φ = 269895060.

The previous prime is 404842589. The next prime is 404842649. The reversal of 404842593 is 395248404.

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 not a de Polignac number, because 404842593 - 2² = 404842589 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404842553) 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, 67473763 + ... + 67473768.

It is an arithmetic number, because the mean of its divisors is an integer number (134947532).

Almost surely, 2^404842593 is an apocalyptic number.

It is an amenable number.

404842593 is a deficient number, since it is larger than the sum of its proper divisors (134947535).

404842593 is a wasteful number, since it uses less digits than its factorization.

404842593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134947534.

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 404842593 is about 20120.7006090742. The cubic root of 404842593 is about 739.7677582628.

The spelling of 404842593 in words is "four hundred four million, eight hundred forty-two thousand, five hundred ninety-three".