996443909 has 2 divisors, whose sum is σ = 996443910. Its totient is φ = 996443908.

The previous prime is 996443897. The next prime is 996443963. The reversal of 996443909 is 909344699.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 967521025 + 28922884 = 31105^2 + 5378^2 .

It is a cyclic number.

It is not a de Polignac number, because 996443909 - 2⁴ = 996443893 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 (996443969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498221954 + 498221955.

It is an arithmetic number, because the mean of its divisors is an integer number (498221955).

Almost surely, 2^996443909 is an apocalyptic number.

It is an amenable number.

996443909 is a deficient number, since it is larger than the sum of its proper divisors (1).

996443909 is an equidigital number, since it uses as much as digits as its factorization.

996443909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1889568, while the sum is 53.

The square root of 996443909 is about 31566.4997901256. The cubic root of 996443909 is about 998.8132284638.

The spelling of 996443909 in words is "nine hundred ninety-six million, four hundred forty-three thousand, nine hundred nine".