80447681 has 2 divisors, whose sum is σ = 80447682. Its totient is φ = 80447680.

The previous prime is 80447671. The next prime is 80447687. The reversal of 80447681 is 18674408.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45104656 + 35343025 = 6716^2 + 5945^2 .

It is a cyclic number.

It is not a de Polignac number, because 80447681 - 2²² = 76253377 is a prime.

It is a super-2 number, since 2×80447681² = 12943658756555522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80447687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40223840 + 40223841.

It is an arithmetic number, because the mean of its divisors is an integer number (40223841).

Almost surely, 2^80447681 is an apocalyptic number.

It is an amenable number.

80447681 is a deficient number, since it is larger than the sum of its proper divisors (1).

80447681 is an equidigital number, since it uses as much as digits as its factorization.

80447681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 80447681 is about 8969.2631246942. The cubic root of 80447681 is about 431.6891929496.

The spelling of 80447681 in words is "eighty million, four hundred forty-seven thousand, six hundred eighty-one".