478665547 has 2 divisors, whose sum is σ = 478665548. Its totient is φ = 478665546.

The previous prime is 478665521. The next prime is 478665557. The reversal of 478665547 is 745566874.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 478665547 - 2¹¹ = 478663499 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 478665494 and 478665503.

It is not a weakly prime, because it can be changed into another prime (478665557) 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, 239332773 + 239332774.

It is an arithmetic number, because the mean of its divisors is an integer number (239332774).

Almost surely, 2^478665547 is an apocalyptic number.

478665547 is a deficient number, since it is larger than the sum of its proper divisors (1).

478665547 is an equidigital number, since it uses as much as digits as its factorization.

478665547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5644800, while the sum is 52.

The square root of 478665547 is about 21878.4265202048. The cubic root of 478665547 is about 782.2472705046.

The spelling of 478665547 in words is "four hundred seventy-eight million, six hundred sixty-five thousand, five hundred forty-seven".