404312513 has 16 divisors (see below), whose sum is σ = 467653824. Its totient is φ = 345461760.

The previous prime is 404312437. The next prime is 404312527. The reversal of 404312513 is 315213404.

It is not a de Polignac number, because 404312513 - 2¹⁰ = 404311489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (404312813) 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 15 ways as a sum of consecutive naturals, for example, 241706 + ... + 243372.

It is an arithmetic number, because the mean of its divisors is an integer number (29228364).

Almost surely, 2^404312513 is an apocalyptic number.

It is an amenable number.

404312513 is a deficient number, since it is larger than the sum of its proper divisors (63341311).

404312513 is a wasteful number, since it uses less digits than its factorization.

404312513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2992.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 404312513 is about 20107.5237908600. The cubic root of 404312513 is about 739.4447460005. Note that the first 3 decimals are identical.

Adding to 404312513 its reverse (315213404), we get a palindrome (719525917).

The spelling of 404312513 in words is "four hundred four million, three hundred twelve thousand, five hundred thirteen".