478172573 has 2 divisors, whose sum is σ = 478172574. Its totient is φ = 478172572.

The previous prime is 478172509. The next prime is 478172587. The reversal of 478172573 is 375271874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 400080004 + 78092569 = 20002^2 + 8837^2 .

It is a cyclic number.

It is not a de Polignac number, because 478172573 - 2⁶ = 478172509 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478172273) 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, 239086286 + 239086287.

It is an arithmetic number, because the mean of its divisors is an integer number (239086287).

Almost surely, 2^478172573 is an apocalyptic number.

It is an amenable number.

478172573 is a deficient number, since it is larger than the sum of its proper divisors (1).

478172573 is an equidigital number, since it uses as much as digits as its factorization.

478172573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 329280, while the sum is 44.

The square root of 478172573 is about 21867.1574055706. The cubic root of 478172573 is about 781.9786347601.

It can be divided in two parts, 47817 and 2573, that multiplied together give a triangular number (123033141 = T₁₅₆₈₆).

The spelling of 478172573 in words is "four hundred seventy-eight million, one hundred seventy-two thousand, five hundred seventy-three".