489211985 has 4 divisors (see below), whose sum is σ = 587054388. Its totient is φ = 391369584.

The previous prime is 489211973. The next prime is 489211997. The reversal of 489211985 is 589112984.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (489211973) and next prime (489211997).

It can be written as a sum of positive squares in 2 ways, for example, as 187251856 + 301960129 = 13684^2 + 17377^2 .

It is a cyclic number.

It is not a de Polignac number, because 489211985 - 2¹⁴ = 489195601 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48921194 + ... + 48921203.

It is an arithmetic number, because the mean of its divisors is an integer number (146763597).

Almost surely, 2^489211985 is an apocalyptic number.

It is an amenable number.

489211985 is a deficient number, since it is larger than the sum of its proper divisors (97842403).

489211985 is an equidigital number, since it uses as much as digits as its factorization.

489211985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97842402.

The product of its digits is 207360, while the sum is 47.

The square root of 489211985 is about 22118.1370146764. The cubic root of 489211985 is about 787.9506704027.

Subtracting 489211985 from its reverse (589112984), we obtain a palindrome (99900999).

The spelling of 489211985 in words is "four hundred eighty-nine million, two hundred eleven thousand, nine hundred eighty-five".