996996397 has 2 divisors, whose sum is σ = 996996398. Its totient is φ = 996996396.

The previous prime is 996996391. The next prime is 996996421. The reversal of 996996397 is 793699699.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 829785636 + 167210761 = 28806^2 + 12931^2 .

It is a cyclic number.

It is not a de Polignac number, because 996996397 - 2³ = 996996389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (996996391) 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, 498498198 + 498498199.

It is an arithmetic number, because the mean of its divisors is an integer number (498498199).

Almost surely, 2^996996397 is an apocalyptic number.

It is an amenable number.

996996397 is a deficient number, since it is larger than the sum of its proper divisors (1).

996996397 is an equidigital number, since it uses as much as digits as its factorization.

996996397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44641044, while the sum is 67.

The square root of 996996397 is about 31575.2497535649. The cubic root of 996996397 is about 998.9977949205.

The spelling of 996996397 in words is "nine hundred ninety-six million, nine hundred ninety-six thousand, three hundred ninety-seven".