404247513 has 4 divisors (see below), whose sum is σ = 538996688. Its totient is φ = 269498340.

The previous prime is 404247511. The next prime is 404247583. The reversal of 404247513 is 315742404.

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 404247513 - 2¹ = 404247511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404247511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67374583 + ... + 67374588.

It is an arithmetic number, because the mean of its divisors is an integer number (134749172).

Almost surely, 2^404247513 is an apocalyptic number.

It is an amenable number.

404247513 is a deficient number, since it is larger than the sum of its proper divisors (134749175).

404247513 is a wasteful number, since it uses less digits than its factorization.

404247513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134749174.

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 404247513 is about 20105.9074154836. The cubic root of 404247513 is about 739.4051178392.

Adding to 404247513 its reverse (315742404), we get a palindrome (719989917).

The spelling of 404247513 in words is "four hundred four million, two hundred forty-seven thousand, five hundred thirteen".