478644253 has 4 divisors (see below), whose sum is σ = 480506940. Its totient is φ = 476781568.

The previous prime is 478644251. The next prime is 478644259. The reversal of 478644253 is 352446874.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 283147929 + 195496324 = 16827^2 + 13982^2 .

It is a cyclic number.

It is not a de Polignac number, because 478644253 - 2¹ = 478644251 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478644251) 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 in 3 ways as a sum of consecutive naturals, for example, 930958 + ... + 931471.

It is an arithmetic number, because the mean of its divisors is an integer number (120126735).

Almost surely, 2^478644253 is an apocalyptic number.

It is an amenable number.

478644253 is a deficient number, since it is larger than the sum of its proper divisors (1862687).

478644253 is a wasteful number, since it uses less digits than its factorization.

478644253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1862686.

The product of its digits is 645120, while the sum is 43.

The square root of 478644253 is about 21877.9398710208. The cubic root of 478644253 is about 782.2356706025.

The spelling of 478644253 in words is "four hundred seventy-eight million, six hundred forty-four thousand, two hundred fifty-three".