478493947 has 2 divisors, whose sum is σ = 478493948. Its totient is φ = 478493946.

The previous prime is 478493923. The next prime is 478494031. The reversal of 478493947 is 749394874.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 478493947 - 2¹¹ = 478491899 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (478493347) 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, 239246973 + 239246974.

It is an arithmetic number, because the mean of its divisors is an integer number (239246974).

Almost surely, 2^478493947 is an apocalyptic number.

478493947 is a deficient number, since it is larger than the sum of its proper divisors (1).

478493947 is an equidigital number, since it uses as much as digits as its factorization.

478493947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6096384, while the sum is 55.

The square root of 478493947 is about 21874.5044972452. The cubic root of 478493947 is about 782.1537816539.

The spelling of 478493947 in words is "four hundred seventy-eight million, four hundred ninety-three thousand, nine hundred forty-seven".