1996996081 has 2 divisors, whose sum is σ = 1996996082. Its totient is φ = 1996996080.

The previous prime is 1996996073. The next prime is 1996996093. The reversal of 1996996081 is 1806996991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1184461056 + 812535025 = 34416^2 + 28505^2 .

It is an emirp because it is prime and its reverse (1806996991) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 1809669661 and 1669669081.

It is a cyclic number.

It is not a de Polignac number, because 1996996081 - 2³ = 1996996073 is a prime.

It is a super-2 number, since 2×1996996081² = 7975986695058717122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1996996031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998498040 + 998498041.

It is an arithmetic number, because the mean of its divisors is an integer number (998498041).

Almost surely, 2^1996996081 is an apocalyptic number.

It is an amenable number.

1996996081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1996996081 is an equidigital number, since it uses as much as digits as its factorization.

1996996081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1889568, while the sum is 58.

The square root of 1996996081 is about 44687.7620943363. The cubic root of 1996996081 is about 1259.2899503640.

The spelling of 1996996081 in words is "one billion, nine hundred ninety-six million, nine hundred ninety-six thousand, eighty-one".