996543389 has 2 divisors, whose sum is σ = 996543390. Its totient is φ = 996543388.

The previous prime is 996543319. The next prime is 996543421. The reversal of 996543389 is 983345699.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 550277764 + 446265625 = 23458^2 + 21125^2 .

It is a cyclic number.

It is not a de Polignac number, because 996543389 - 2⁸ = 996543133 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 (996543319) 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, 498271694 + 498271695.

It is an arithmetic number, because the mean of its divisors is an integer number (498271695).

Almost surely, 2^996543389 is an apocalyptic number.

It is an amenable number.

996543389 is a deficient number, since it is larger than the sum of its proper divisors (1).

996543389 is an equidigital number, since it uses as much as digits as its factorization.

996543389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6298560, while the sum is 56.

The square root of 996543389 is about 31568.0754719067. The cubic root of 996543389 is about 998.8464662048.

The spelling of 996543389 in words is "nine hundred ninety-six million, five hundred forty-three thousand, three hundred eighty-nine".