489371893 has 2 divisors, whose sum is σ = 489371894. Its totient is φ = 489371892.

The previous prime is 489371881. The next prime is 489371903. The reversal of 489371893 is 398173984.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 459973809 + 29398084 = 21447^2 + 5422^2 .

It is a cyclic number.

It is not a de Polignac number, because 489371893 - 2¹³ = 489363701 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 489371893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (489371833) 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, 244685946 + 244685947.

It is an arithmetic number, because the mean of its divisors is an integer number (244685947).

Almost surely, 2^489371893 is an apocalyptic number.

It is an amenable number.

489371893 is a deficient number, since it is larger than the sum of its proper divisors (1).

489371893 is an equidigital number, since it uses as much as digits as its factorization.

489371893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 52.

The square root of 489371893 is about 22121.7515807406. The cubic root of 489371893 is about 788.0365131414.

The spelling of 489371893 in words is "four hundred eighty-nine million, three hundred seventy-one thousand, eight hundred ninety-three".