478230257 has 2 divisors, whose sum is σ = 478230258. Its totient is φ = 478230256.

The previous prime is 478230241. The next prime is 478230287. The reversal of 478230257 is 752032874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 474194176 + 4036081 = 21776^2 + 2009^2 .

It is a cyclic number.

It is not a de Polignac number, because 478230257 - 2⁴ = 478230241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 478230257.

It is not a weakly prime, because it can be changed into another prime (478230287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239115128 + 239115129.

It is an arithmetic number, because the mean of its divisors is an integer number (239115129).

Almost surely, 2^478230257 is an apocalyptic number.

It is an amenable number.

478230257 is a deficient number, since it is larger than the sum of its proper divisors (1).

478230257 is an equidigital number, since it uses as much as digits as its factorization.

478230257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94080, while the sum is 38.

The square root of 478230257 is about 21868.4763300967. The cubic root of 478230257 is about 782.0100779701.

The spelling of 478230257 in words is "four hundred seventy-eight million, two hundred thirty thousand, two hundred fifty-seven".