489978443 has 2 divisors, whose sum is σ = 489978444. Its totient is φ = 489978442.

The previous prime is 489978439. The next prime is 489978449. The reversal of 489978443 is 344879984.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 489978443 - 2² = 489978439 is a prime.

It is not a weakly prime, because it can be changed into another prime (489978449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244989221 + 244989222.

It is an arithmetic number, because the mean of its divisors is an integer number (244989222).

Almost surely, 2^489978443 is an apocalyptic number.

489978443 is a deficient number, since it is larger than the sum of its proper divisors (1).

489978443 is an equidigital number, since it uses as much as digits as its factorization.

489978443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6967296, while the sum is 56.

The square root of 489978443 is about 22135.4566928266. The cubic root of 489978443 is about 788.3619549383.

The spelling of 489978443 in words is "four hundred eighty-nine million, nine hundred seventy-eight thousand, four hundred forty-three".