489289391 has 2 divisors, whose sum is σ = 489289392. Its totient is φ = 489289390.

The previous prime is 489289351. The next prime is 489289441. The reversal of 489289391 is 193982984.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 489289391 - 2¹⁰ = 489288367 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (489289321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244644695 + 244644696.

It is an arithmetic number, because the mean of its divisors is an integer number (244644696).

Almost surely, 2^489289391 is an apocalyptic number.

489289391 is a deficient number, since it is larger than the sum of its proper divisors (1).

489289391 is an equidigital number, since it uses as much as digits as its factorization.

489289391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 53.

The square root of 489289391 is about 22119.8867763829. The cubic root of 489289391 is about 787.9922262754.

It can be divided in two parts, 4892893 and 91, that added together give a palindrome (4892984).

The spelling of 489289391 in words is "four hundred eighty-nine million, two hundred eighty-nine thousand, three hundred ninety-one".