996081409 has 2 divisors, whose sum is σ = 996081410. Its totient is φ = 996081408.

The previous prime is 996081407. The next prime is 996081419. The reversal of 996081409 is 904180699.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 965034225 + 31047184 = 31065^2 + 5572^2 .

It is a cyclic number.

It is not a de Polignac number, because 996081409 - 2¹ = 996081407 is a prime.

Together with 996081407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (996081407) 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, 498040704 + 498040705.

It is an arithmetic number, because the mean of its divisors is an integer number (498040705).

Almost surely, 2^996081409 is an apocalyptic number.

It is an amenable number.

996081409 is a deficient number, since it is larger than the sum of its proper divisors (1).

996081409 is an equidigital number, since it uses as much as digits as its factorization.

996081409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 996081409 is about 31560.7574212027. The cubic root of 996081409 is about 998.6920931254.

The spelling of 996081409 in words is "nine hundred ninety-six million, eighty-one thousand, four hundred nine".