996755891 has 2 divisors, whose sum is σ = 996755892. Its totient is φ = 996755890.

The previous prime is 996755887. The next prime is 996755909. The reversal of 996755891 is 198557699.

It is a weak prime.

It is an emirp because it is prime and its reverse (198557699) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 996755891 - 2² = 996755887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 996755891.

It is not a weakly prime, because it can be changed into another prime (996755861) 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, 498377945 + 498377946.

It is an arithmetic number, because the mean of its divisors is an integer number (498377946).

Almost surely, 2^996755891 is an apocalyptic number.

996755891 is a deficient number, since it is larger than the sum of its proper divisors (1).

996755891 is an equidigital number, since it uses as much as digits as its factorization.

996755891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6123600, while the sum is 59.

The square root of 996755891 is about 31571.4410662548. The cubic root of 996755891 is about 998.9174588609.

The spelling of 996755891 in words is "nine hundred ninety-six million, seven hundred fifty-five thousand, eight hundred ninety-one".