478838249 has 2 divisors, whose sum is σ = 478838250. Its totient is φ = 478838248.

The previous prime is 478838233. The next prime is 478838251. The reversal of 478838249 is 942838874.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 478515625 + 322624 = 21875^2 + 568^2 .

It is a cyclic number.

It is not a de Polignac number, because 478838249 - 2⁴ = 478838233 is a prime.

Together with 478838251, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 478838249.

It is not a weakly prime, because it can be changed into another prime (478838279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239419124 + 239419125.

It is an arithmetic number, because the mean of its divisors is an integer number (239419125).

Almost surely, 2^478838249 is an apocalyptic number.

It is an amenable number.

478838249 is a deficient number, since it is larger than the sum of its proper divisors (1).

478838249 is an equidigital number, since it uses as much as digits as its factorization.

478838249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3096576, while the sum is 53.

The square root of 478838249 is about 21882.3730203102. The cubic root of 478838249 is about 782.3413371758.

The spelling of 478838249 in words is "four hundred seventy-eight million, eight hundred thirty-eight thousand, two hundred forty-nine".