80689841 has 2 divisors, whose sum is σ = 80689842. Its totient is φ = 80689840.

The previous prime is 80689811. The next prime is 80689879. The reversal of 80689841 is 14898608.

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., 76195441 + 4494400 = 8729^2 + 2120^2 .

It is a cyclic number.

It is not a de Polignac number, because 80689841 - 2²² = 76495537 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 80689792 and 80689801.

It is not a weakly prime, because it can be changed into another prime (80689811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40344920 + 40344921.

It is an arithmetic number, because the mean of its divisors is an integer number (40344921).

Almost surely, 2^80689841 is an apocalyptic number.

It is an amenable number.

80689841 is a deficient number, since it is larger than the sum of its proper divisors (1).

80689841 is an equidigital number, since it uses as much as digits as its factorization.

80689841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 80689841 is about 8982.7524178283. The cubic root of 80689841 is about 432.1219095385.

The spelling of 80689841 in words is "eighty million, six hundred eighty-nine thousand, eight hundred forty-one".