1980896081 has 2 divisors, whose sum is σ = 1980896082. Its totient is φ = 1980896080.

The previous prime is 1980896059. The next prime is 1980896087. The reversal of 1980896081 is 1806980891.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1858041025 + 122855056 = 43105^2 + 11084^2 .

It is an emirp because it is prime and its reverse (1806980891) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 1809680861 and 1680869081.

It is a cyclic number.

It is not a de Polignac number, because 1980896081 - 2²² = 1976701777 is a prime.

It is a super-2 number, since 2×1980896081² = 7847898567442317122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1980896087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 990448040 + 990448041.

It is an arithmetic number, because the mean of its divisors is an integer number (990448041).

Almost surely, 2^1980896081 is an apocalyptic number.

It is an amenable number.

1980896081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1980896081 is an equidigital number, since it uses as much as digits as its factorization.

1980896081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 50.

The square root of 1980896081 is about 44507.2587450631. The cubic root of 1980896081 is about 1255.8966372758.

The spelling of 1980896081 in words is "one billion, nine hundred eighty million, eight hundred ninety-six thousand, eighty-one".