478268387 has 2 divisors, whose sum is σ = 478268388. Its totient is φ = 478268386.

The previous prime is 478268359. The next prime is 478268407. The reversal of 478268387 is 783862874.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478268387 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (478268587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239134193 + 239134194.

It is an arithmetic number, because the mean of its divisors is an integer number (239134194).

Almost surely, 2^478268387 is an apocalyptic number.

478268387 is a deficient number, since it is larger than the sum of its proper divisors (1).

478268387 is an equidigital number, since it uses as much as digits as its factorization.

478268387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3612672, while the sum is 53.

The square root of 478268387 is about 21869.3481155703. The cubic root of 478268387 is about 782.0308610213.

The spelling of 478268387 in words is "four hundred seventy-eight million, two hundred sixty-eight thousand, three hundred eighty-seven".