478552781 has 4 divisors (see below), whose sum is σ = 546917472. Its totient is φ = 410188092.

The previous prime is 478552759. The next prime is 478552787. The reversal of 478552781 is 187255874.

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.

It is a cyclic number.

It is not a de Polignac number, because 478552781 - 2¹⁰ = 478551757 is a prime.

It is a super-2 number, since 2×478552781² = 458025528405667922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478552787) 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, 34182335 + ... + 34182348.

It is an arithmetic number, because the mean of its divisors is an integer number (136729368).

Almost surely, 2^478552781 is an apocalyptic number.

It is an amenable number.

478552781 is a deficient number, since it is larger than the sum of its proper divisors (68364691).

478552781 is an equidigital number, since it uses as much as digits as its factorization.

478552781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68364690.

The product of its digits is 627200, while the sum is 47.

The square root of 478552781 is about 21875.8492635143. The cubic root of 478552781 is about 782.1858373360.

The spelling of 478552781 in words is "four hundred seventy-eight million, five hundred fifty-two thousand, seven hundred eighty-one".