489821837 has 2 divisors, whose sum is σ = 489821838. Its totient is φ = 489821836.

The previous prime is 489821809. The next prime is 489821851. The reversal of 489821837 is 738128984.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 429898756 + 59923081 = 20734^2 + 7741^2 .

It is a cyclic number.

It is not a de Polignac number, because 489821837 - 2⁸ = 489821581 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 (489821807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244910918 + 244910919.

It is an arithmetic number, because the mean of its divisors is an integer number (244910919).

Almost surely, 2^489821837 is an apocalyptic number.

It is an amenable number.

489821837 is a deficient number, since it is larger than the sum of its proper divisors (1).

489821837 is an equidigital number, since it uses as much as digits as its factorization.

489821837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 50.

The square root of 489821837 is about 22131.9189633434. The cubic root of 489821837 is about 788.2779543937.

The spelling of 489821837 in words is "four hundred eighty-nine million, eight hundred twenty-one thousand, eight hundred thirty-seven".