996771943 has 2 divisors, whose sum is σ = 996771944. Its totient is φ = 996771942.

The previous prime is 996771899. The next prime is 996771967. The reversal of 996771943 is 349177699.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-996771943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (996771043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498385971 + 498385972.

It is an arithmetic number, because the mean of its divisors is an integer number (498385972).

Almost surely, 2^996771943 is an apocalyptic number.

996771943 is a deficient number, since it is larger than the sum of its proper divisors (1).

996771943 is an equidigital number, since it uses as much as digits as its factorization.

996771943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2571912, while the sum is 55.

The square root of 996771943 is about 31571.6952823253. The cubic root of 996771943 is about 998.9228211022.

The spelling of 996771943 in words is "nine hundred ninety-six million, seven hundred seventy-one thousand, nine hundred forty-three".