404425513 has 4 divisors (see below), whose sum is σ = 408429828. Its totient is φ = 400421200.

The previous prime is 404425499. The next prime is 404425519. The reversal of 404425513 is 315524404.

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 318158569 + 86266944 = 17837^2 + 9288^2 .

It is a cyclic number.

It is not a de Polignac number, because 404425513 - 2⁵ = 404425481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404425519) 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, 2002006 + ... + 2002207.

It is an arithmetic number, because the mean of its divisors is an integer number (102107457).

Almost surely, 2^404425513 is an apocalyptic number.

It is an amenable number.

404425513 is a deficient number, since it is larger than the sum of its proper divisors (4004315).

404425513 is a wasteful number, since it uses less digits than its factorization.

404425513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004314.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 404425513 is about 20110.3334880354. Note that the first 3 decimals coincide. The cubic root of 404425513 is about 739.5136279260.

Adding to 404425513 its reverse (315524404), we get a palindrome (719949917).

The spelling of 404425513 in words is "four hundred four million, four hundred twenty-five thousand, five hundred thirteen".