478884090989 has 2 divisors, whose sum is σ = 478884090990. Its totient is φ = 478884090988.

The previous prime is 478884090967. The next prime is 478884091001. The reversal of 478884090989 is 989090488874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 429136357225 + 49747733764 = 655085^2 + 223042^2 .

It is a cyclic number.

It is not a de Polignac number, because 478884090989 - 2¹² = 478884086893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478884099989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239442045494 + 239442045495.

It is an arithmetic number, because the mean of its divisors is an integer number (239442045495).

Almost surely, 2^478884090989 is an apocalyptic number.

It is an amenable number.

478884090989 is a deficient number, since it is larger than the sum of its proper divisors (1).

478884090989 is an equidigital number, since it uses as much as digits as its factorization.

478884090989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 334430208, while the sum is 74.

The spelling of 478884090989 in words is "four hundred seventy-eight billion, eight hundred eighty-four million, ninety thousand, nine hundred eighty-nine".