489969101 has 2 divisors, whose sum is σ = 489969102. Its totient is φ = 489969100.

The previous prime is 489969071. The next prime is 489969163. The reversal of 489969101 is 101969984.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 434764201 + 55204900 = 20851^2 + 7430^2 .

It is a cyclic number.

It is not a de Polignac number, because 489969101 - 2⁶ = 489969037 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 (489969001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244984550 + 244984551.

It is an arithmetic number, because the mean of its divisors is an integer number (244984551).

Almost surely, 2^489969101 is an apocalyptic number.

It is an amenable number.

489969101 is a deficient number, since it is larger than the sum of its proper divisors (1).

489969101 is an equidigital number, since it uses as much as digits as its factorization.

489969101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 489969101 is about 22135.2456729082. The cubic root of 489969101 is about 788.3569445654.

The spelling of 489969101 in words is "four hundred eighty-nine million, nine hundred sixty-nine thousand, one hundred one".