404342013 has 4 divisors (see below), whose sum is σ = 539122688. Its totient is φ = 269561340.

The previous prime is 404342009. The next prime is 404342017. The reversal of 404342013 is 310243404.

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 an interprime number because it is at equal distance from previous prime (404342009) and next prime (404342017).

It is not a de Polignac number, because 404342013 - 2² = 404342009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404342017) 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, 67390333 + ... + 67390338.

It is an arithmetic number, because the mean of its divisors is an integer number (134780672).

Almost surely, 2^404342013 is an apocalyptic number.

It is an amenable number.

404342013 is a deficient number, since it is larger than the sum of its proper divisors (134780675).

404342013 is a wasteful number, since it uses less digits than its factorization.

404342013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134780674.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 404342013 is about 20108.2573337423. The cubic root of 404342013 is about 739.4627296879.

Adding to 404342013 its reverse (310243404), we get a palindrome (714585417).

It can be divided in two parts, 4043 and 42013, that added together give a triangular number (46056 = T₃₀₃).

The spelling of 404342013 in words is "four hundred four million, three hundred forty-two thousand, thirteen".