989677613 has 2 divisors, whose sum is σ = 989677614. Its totient is φ = 989677612.

The previous prime is 989677589. The next prime is 989677657. The reversal of 989677613 is 316776989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 940158244 + 49519369 = 30662^2 + 7037^2 .

It is a cyclic number.

It is not a de Polignac number, because 989677613 - 2¹⁴ = 989661229 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 (989677313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494838806 + 494838807.

It is an arithmetic number, because the mean of its divisors is an integer number (494838807).

Almost surely, 2^989677613 is an apocalyptic number.

It is an amenable number.

989677613 is a deficient number, since it is larger than the sum of its proper divisors (1).

989677613 is an equidigital number, since it uses as much as digits as its factorization.

989677613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3429216, while the sum is 56.

The square root of 989677613 is about 31459.1419622341. The cubic root of 989677613 is about 996.5472968947.

The spelling of 989677613 in words is "nine hundred eighty-nine million, six hundred seventy-seven thousand, six hundred thirteen".