80297981 has 2 divisors, whose sum is σ = 80297982. Its totient is φ = 80297980.

The previous prime is 80297977. The next prime is 80297989. The reversal of 80297981 is 18979208.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70476025 + 9821956 = 8395^2 + 3134^2 .

It is a cyclic number.

It is not a de Polignac number, because 80297981 - 2² = 80297977 is a prime.

It is a super-2 number, since 2×80297981² = 12895531505352722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80297989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40148990 + 40148991.

It is an arithmetic number, because the mean of its divisors is an integer number (40148991).

Almost surely, 2^80297981 is an apocalyptic number.

It is an amenable number.

80297981 is a deficient number, since it is larger than the sum of its proper divisors (1).

80297981 is an equidigital number, since it uses as much as digits as its factorization.

80297981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 80297981 is about 8960.9140716782. The cubic root of 80297981 is about 431.4212589844.

The spelling of 80297981 in words is "eighty million, two hundred ninety-seven thousand, nine hundred eighty-one".