478172287 has 2 divisors, whose sum is σ = 478172288. Its totient is φ = 478172286.

The previous prime is 478172281. The next prime is 478172293. The reversal of 478172287 is 782271874.

It is a balanced prime because it is at equal distance from previous prime (478172281) and next prime (478172293).

It is a cyclic number.

It is not a de Polignac number, because 478172287 - 2⁷ = 478172159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478172281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239086143 + 239086144.

It is an arithmetic number, because the mean of its divisors is an integer number (239086144).

Almost surely, 2^478172287 is an apocalyptic number.

478172287 is a deficient number, since it is larger than the sum of its proper divisors (1).

478172287 is an equidigital number, since it uses as much as digits as its factorization.

478172287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 351232, while the sum is 46.

The square root of 478172287 is about 21867.1508660822. The cubic root of 478172287 is about 781.9784788569.

The spelling of 478172287 in words is "four hundred seventy-eight million, one hundred seventy-two thousand, two hundred eighty-seven".