478135547 has 2 divisors, whose sum is σ = 478135548. Its totient is φ = 478135546.

The previous prime is 478135543. The next prime is 478135549. The reversal of 478135547 is 745531874.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 478135547 - 2² = 478135543 is a prime.

It is a super-2 number, since 2×478135547² = 457227202609978418, which contains 22 as substring.

Together with 478135549, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 478135498 and 478135507.

It is not a weakly prime, because it can be changed into another prime (478135543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239067773 + 239067774.

It is an arithmetic number, because the mean of its divisors is an integer number (239067774).

Almost surely, 2^478135547 is an apocalyptic number.

478135547 is a deficient number, since it is larger than the sum of its proper divisors (1).

478135547 is an equidigital number, since it uses as much as digits as its factorization.

478135547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 470400, while the sum is 44.

The square root of 478135547 is about 21866.3107770835. The cubic root of 478135547 is about 781.9584507722.

The spelling of 478135547 in words is "four hundred seventy-eight million, one hundred thirty-five thousand, five hundred forty-seven".