404344013 has 4 divisors (see below), whose sum is σ = 418286940. Its totient is φ = 390401088.

The previous prime is 404343983. The next prime is 404344037. The reversal of 404344013 is 310443404.

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

It can be written as a sum of positive squares in 2 ways, for example, as 100260169 + 304083844 = 10013^2 + 17438^2 .

It is a cyclic number.

It is not a de Polignac number, because 404344013 - 2⁶ = 404343949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 404344013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404344043) 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, 6971420 + ... + 6971477.

It is an arithmetic number, because the mean of its divisors is an integer number (104571735).

Almost surely, 2^404344013 is an apocalyptic number.

It is an amenable number.

404344013 is a deficient number, since it is larger than the sum of its proper divisors (13942927).

404344013 is a wasteful number, since it uses less digits than its factorization.

404344013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13942926.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 404344013 is about 20108.3070644945. The cubic root of 404344013 is about 739.4639488893.

Adding to 404344013 its reverse (310443404), we get a palindrome (714787417).

The spelling of 404344013 in words is "four hundred four million, three hundred forty-four thousand, thirteen".