996680609 has 2 divisors, whose sum is σ = 996680610. Its totient is φ = 996680608.

The previous prime is 996680591. The next prime is 996680611. The reversal of 996680609 is 906086699.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 856849984 + 139830625 = 29272^2 + 11825^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-996680609 is a prime.

It is a super-2 number, since 2×996680609² = 1986744472713221762, which contains 22 as substring.

Together with 996680611, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (996680639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498340304 + 498340305.

It is an arithmetic number, because the mean of its divisors is an integer number (498340305).

Almost surely, 2^996680609 is an apocalyptic number.

It is an amenable number.

996680609 is a deficient number, since it is larger than the sum of its proper divisors (1).

996680609 is an equidigital number, since it uses as much as digits as its factorization.

996680609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1259712, while the sum is 53.

The square root of 996680609 is about 31570.2487953453. The cubic root of 996680609 is about 998.8923098088.

The spelling of 996680609 in words is "nine hundred ninety-six million, six hundred eighty thousand, six hundred nine".