478785431 has 2 divisors, whose sum is σ = 478785432. Its totient is φ = 478785430.

The previous prime is 478785403. The next prime is 478785469. The reversal of 478785431 is 134587874.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478785431 is a prime.

It is a super-2 number, since 2×478785431² = 458470977875711522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478785491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239392715 + 239392716.

It is an arithmetic number, because the mean of its divisors is an integer number (239392716).

Almost surely, 2^478785431 is an apocalyptic number.

478785431 is a deficient number, since it is larger than the sum of its proper divisors (1).

478785431 is an equidigital number, since it uses as much as digits as its factorization.

478785431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 752640, while the sum is 47.

The square root of 478785431 is about 21881.1661252320. The cubic root of 478785431 is about 782.3125708688.

The spelling of 478785431 in words is "four hundred seventy-eight million, seven hundred eighty-five thousand, four hundred thirty-one".