489517997 has 2 divisors, whose sum is σ = 489517998. Its totient is φ = 489517996.

The previous prime is 489517967. The next prime is 489518023. The reversal of 489517997 is 799715984.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 448634761 + 40883236 = 21181^2 + 6394^2 .

It is a cyclic number.

It is not a de Polignac number, because 489517997 - 2⁶ = 489517933 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 (489517927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244758998 + 244758999.

It is an arithmetic number, because the mean of its divisors is an integer number (244758999).

Almost surely, 2^489517997 is an apocalyptic number.

It is an amenable number.

489517997 is a deficient number, since it is larger than the sum of its proper divisors (1).

489517997 is an equidigital number, since it uses as much as digits as its factorization.

489517997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5715360, while the sum is 59.

The square root of 489517997 is about 22125.0536044548. The cubic root of 489517997 is about 788.1149291901.

The spelling of 489517997 in words is "four hundred eighty-nine million, five hundred seventeen thousand, nine hundred ninety-seven".