478134457 has 2 divisors, whose sum is σ = 478134458. Its totient is φ = 478134456.

The previous prime is 478134439. The next prime is 478134463. The reversal of 478134457 is 754431874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 265820416 + 212314041 = 16304^2 + 14571^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478134457 is a prime.

It is a super-2 number, since 2×478134457² = 457225117941369698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (478134427) 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, 239067228 + 239067229.

It is an arithmetic number, because the mean of its divisors is an integer number (239067229).

Almost surely, 2^478134457 is an apocalyptic number.

It is an amenable number.

478134457 is a deficient number, since it is larger than the sum of its proper divisors (1).

478134457 is an equidigital number, since it uses as much as digits as its factorization.

478134457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 376320, while the sum is 43.

The square root of 478134457 is about 21866.2858528832. The cubic root of 478134457 is about 781.9578565646.

The spelling of 478134457 in words is "four hundred seventy-eight million, one hundred thirty-four thousand, four hundred fifty-seven".