478252513 has 2 divisors, whose sum is σ = 478252514. Its totient is φ = 478252512.

The previous prime is 478252507. The next prime is 478252559. The reversal of 478252513 is 315252874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 281467729 + 196784784 = 16777^2 + 14028^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478252513 is a prime.

It is not a weakly prime, because it can be changed into another prime (478252913) 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 as a sum of consecutive naturals, namely, 239126256 + 239126257.

It is an arithmetic number, because the mean of its divisors is an integer number (239126257).

Almost surely, 2^478252513 is an apocalyptic number.

It is an amenable number.

478252513 is a deficient number, since it is larger than the sum of its proper divisors (1).

478252513 is an equidigital number, since it uses as much as digits as its factorization.

478252513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67200, while the sum is 37.

The square root of 478252513 is about 21868.9851845027. The cubic root of 478252513 is about 782.0222089091.

The spelling of 478252513 in words is "four hundred seventy-eight million, two hundred fifty-two thousand, five hundred thirteen".