478455487 has 2 divisors, whose sum is σ = 478455488. Its totient is φ = 478455486.

The previous prime is 478455451. The next prime is 478455493. The reversal of 478455487 is 784554874.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 478455487 - 2¹⁹ = 477931199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478455437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239227743 + 239227744.

It is an arithmetic number, because the mean of its divisors is an integer number (239227744).

Almost surely, 2^478455487 is an apocalyptic number.

478455487 is a deficient number, since it is larger than the sum of its proper divisors (1).

478455487 is an equidigital number, since it uses as much as digits as its factorization.

478455487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5017600, while the sum is 52.

The square root of 478455487 is about 21873.6253739521. The cubic root of 478455487 is about 782.1328253174.

The spelling of 478455487 in words is "four hundred seventy-eight million, four hundred fifty-five thousand, four hundred eighty-seven".