80963681 has 2 divisors, whose sum is σ = 80963682. Its totient is φ = 80963680.

The previous prime is 80963677. The next prime is 80963713. The reversal of 80963681 is 18636908.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76720081 + 4243600 = 8759^2 + 2060^2 .

It is a cyclic number.

It is not a de Polignac number, because 80963681 - 2² = 80963677 is a prime.

It is a super-2 number, since 2×80963681² = 13110235282139522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80963581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40481840 + 40481841.

It is an arithmetic number, because the mean of its divisors is an integer number (40481841).

Almost surely, 2^80963681 is an apocalyptic number.

It is an amenable number.

80963681 is a deficient number, since it is larger than the sum of its proper divisors (1).

80963681 is an equidigital number, since it uses as much as digits as its factorization.

80963681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 80963681 is about 8997.9820515491. The cubic root of 80963681 is about 432.6101934465.

The spelling of 80963681 in words is "eighty million, nine hundred sixty-three thousand, six hundred eighty-one".