478996849 has 2 divisors, whose sum is σ = 478996850. Its totient is φ = 478996848.

The previous prime is 478996831. The next prime is 478996907. The reversal of 478996849 is 948699874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 277555600 + 201441249 = 16660^2 + 14193^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478996849 is a prime.

It is not a weakly prime, because it can be changed into another prime (478996549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239498424 + 239498425.

It is an arithmetic number, because the mean of its divisors is an integer number (239498425).

Almost surely, 2^478996849 is an apocalyptic number.

It is an amenable number.

478996849 is a deficient number, since it is larger than the sum of its proper divisors (1).

478996849 is an equidigital number, since it uses as much as digits as its factorization.

478996849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31352832, while the sum is 64.

The square root of 478996849 is about 21885.9966416885. The cubic root of 478996849 is about 782.4277029021.

The spelling of 478996849 in words is "four hundred seventy-eight million, nine hundred ninety-six thousand, eight hundred forty-nine".