478442149 has 2 divisors, whose sum is σ = 478442150. Its totient is φ = 478442148.

The previous prime is 478442137. The next prime is 478442177. The reversal of 478442149 is 941244874.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 304677025 + 173765124 = 17455^2 + 13182^2 .

It is a cyclic number.

It is not a de Polignac number, because 478442149 - 2⁹ = 478441637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478442179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239221074 + 239221075.

It is an arithmetic number, because the mean of its divisors is an integer number (239221075).

Almost surely, 2^478442149 is an apocalyptic number.

It is an amenable number.

478442149 is a deficient number, since it is larger than the sum of its proper divisors (1).

478442149 is an equidigital number, since it uses as much as digits as its factorization.

478442149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 43.

The square root of 478442149 is about 21873.3204840966. The cubic root of 478442149 is about 782.1255573584.

The spelling of 478442149 in words is "four hundred seventy-eight million, four hundred forty-two thousand, one hundred forty-nine".