989676517 has 2 divisors, whose sum is σ = 989676518. Its totient is φ = 989676516.

The previous prime is 989676511. The next prime is 989676563. The reversal of 989676517 is 715676989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 744252961 + 245423556 = 27281^2 + 15666^2 .

It is an emirp because it is prime and its reverse (715676989) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989676517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989676511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494838258 + 494838259.

It is an arithmetic number, because the mean of its divisors is an integer number (494838259).

Almost surely, 2^989676517 is an apocalyptic number.

It is an amenable number.

989676517 is a deficient number, since it is larger than the sum of its proper divisors (1).

989676517 is an equidigital number, since it uses as much as digits as its factorization.

989676517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5715360, while the sum is 58.

The square root of 989676517 is about 31459.1245428095. The cubic root of 989676517 is about 996.5469290253.

The spelling of 989676517 in words is "nine hundred eighty-nine million, six hundred seventy-six thousand, five hundred seventeen".