478257513 has 4 divisors (see below), whose sum is σ = 637676688. Its totient is φ = 318838340.

The previous prime is 478257509. The next prime is 478257541. The reversal of 478257513 is 315752874.

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 a cyclic number.

It is not a de Polignac number, because 478257513 - 2² = 478257509 is a prime.

It is not an unprimeable number, because it can be changed into a prime (478257713) 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, 79709583 + ... + 79709588.

It is an arithmetic number, because the mean of its divisors is an integer number (159419172).

Almost surely, 2^478257513 is an apocalyptic number.

It is an amenable number.

478257513 is a deficient number, since it is larger than the sum of its proper divisors (159419175).

478257513 is a wasteful number, since it uses less digits than its factorization.

478257513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159419174.

The product of its digits is 235200, while the sum is 42.

The square root of 478257513 is about 21869.0995013512. The cubic root of 478257513 is about 782.0249341762.

The spelling of 478257513 in words is "four hundred seventy-eight million, two hundred fifty-seven thousand, five hundred thirteen".