478442191 has 2 divisors, whose sum is σ = 478442192. Its totient is φ = 478442190.

The previous prime is 478442179. The next prime is 478442201. The reversal of 478442191 is 191244874.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 478442191 - 2¹⁵ = 478409423 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478842191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239221095 + 239221096.

It is an arithmetic number, because the mean of its divisors is an integer number (239221096).

Almost surely, 2^478442191 is an apocalyptic number.

478442191 is a deficient number, since it is larger than the sum of its proper divisors (1).

478442191 is an equidigital number, since it uses as much as digits as its factorization.

478442191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 40.

The square root of 478442191 is about 21873.3214441703. The cubic root of 478442191 is about 782.1255802447.

The spelling of 478442191 in words is "four hundred seventy-eight million, four hundred forty-two thousand, one hundred ninety-one".