478864663 has 2 divisors, whose sum is σ = 478864664. Its totient is φ = 478864662.

The previous prime is 478864643. The next prime is 478864679. The reversal of 478864663 is 366468874.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 478864663 - 2⁹ = 478864151 is a prime.

It is a super-2 number, since 2×478864663² = 458622730940207138, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 478864663.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478864643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239432331 + 239432332.

It is an arithmetic number, because the mean of its divisors is an integer number (239432332).

Almost surely, 2^478864663 is an apocalyptic number.

478864663 is a deficient number, since it is larger than the sum of its proper divisors (1).

478864663 is an equidigital number, since it uses as much as digits as its factorization.

478864663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4644864, while the sum is 52.

The square root of 478864663 is about 21882.9765571323. The cubic root of 478864663 is about 782.3557222590.

The spelling of 478864663 in words is "four hundred seventy-eight million, eight hundred sixty-four thousand, six hundred sixty-three".