1568478313 has 4 divisors (see below), whose sum is σ = 1601850240. Its totient is φ = 1535106388.

The previous prime is 1568478287. The next prime is 1568478323. The reversal of 1568478313 is 3138748651.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3138748651 = 55621 ⋅56431.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1568478313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1568478323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16685893 + ... + 16685986.

It is an arithmetic number, because the mean of its divisors is an integer number (400462560).

Almost surely, 2^1568478313 is an apocalyptic number.

It is an amenable number.

1568478313 is a deficient number, since it is larger than the sum of its proper divisors (33371927).

1568478313 is an equidigital number, since it uses as much as digits as its factorization.

1568478313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33371926.

The product of its digits is 483840, while the sum is 46.

The square root of 1568478313 is about 39604.0188996016. The cubic root of 1568478313 is about 1161.8752647086.

The spelling of 1568478313 in words is "one billion, five hundred sixty-eight million, four hundred seventy-eight thousand, three hundred thirteen".