478744817 has 2 divisors, whose sum is σ = 478744818. Its totient is φ = 478744816.

The previous prime is 478744807. The next prime is 478744831. The reversal of 478744817 is 718447874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 408201616 + 70543201 = 20204^2 + 8399^2 .

It is a cyclic number.

It is not a de Polignac number, because 478744817 - 2⁴ = 478744801 is a prime.

It is not a weakly prime, because it can be changed into another prime (478744807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239372408 + 239372409.

It is an arithmetic number, because the mean of its divisors is an integer number (239372409).

Almost surely, 2^478744817 is an apocalyptic number.

It is an amenable number.

478744817 is a deficient number, since it is larger than the sum of its proper divisors (1).

478744817 is an equidigital number, since it uses as much as digits as its factorization.

478744817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1404928, while the sum is 50.

The square root of 478744817 is about 21880.2380471511. The cubic root of 478744817 is about 782.2904497967.

The spelling of 478744817 in words is "four hundred seventy-eight million, seven hundred forty-four thousand, eight hundred seventeen".