404134019 has 4 divisors (see below), whose sum is σ = 405425496. Its totient is φ = 402842544.

The previous prime is 404133941. The next prime is 404134037. The reversal of 404134019 is 910431404.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404134019 is a prime.

It is a super-2 number, since 2×404134019² = 326648610626184722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404134039) 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, 645269 + ... + 645894.

It is an arithmetic number, because the mean of its divisors is an integer number (101356374).

Almost surely, 2^404134019 is an apocalyptic number.

404134019 is a deficient number, since it is larger than the sum of its proper divisors (1291477).

404134019 is a wasteful number, since it uses less digits than its factorization.

404134019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291476.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 404134019 is about 20103.0848130330. The cubic root of 404134019 is about 739.3359144458.

The spelling of 404134019 in words is "four hundred four million, one hundred thirty-four thousand, nineteen".