996617689 has 2 divisors, whose sum is σ = 996617690. Its totient is φ = 996617688.

The previous prime is 996617539. The next prime is 996617701. The reversal of 996617689 is 986716699.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 850014025 + 146603664 = 29155^2 + 12108^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-996617689 is a prime.

It is not a weakly prime, because it can be changed into another prime (996615689) 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, 498308844 + 498308845.

It is an arithmetic number, because the mean of its divisors is an integer number (498308845).

Almost surely, 2^996617689 is an apocalyptic number.

It is an amenable number.

996617689 is a deficient number, since it is larger than the sum of its proper divisors (1).

996617689 is an equidigital number, since it uses as much as digits as its factorization.

996617689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8817984, while the sum is 61.

The square root of 996617689 is about 31569.2522717913. The cubic root of 996617689 is about 998.8712894919.

The spelling of 996617689 in words is "nine hundred ninety-six million, six hundred seventeen thousand, six hundred eighty-nine".