80782873 has 2 divisors, whose sum is σ = 80782874. Its totient is φ = 80782872.

The previous prime is 80782847. The next prime is 80782901. The reversal of 80782873 is 37828708.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45118089 + 35664784 = 6717^2 + 5972^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80782873 is a prime.

It is not a weakly prime, because it can be changed into another prime (80782573) 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, 40391436 + 40391437.

It is an arithmetic number, because the mean of its divisors is an integer number (40391437).

Almost surely, 2^80782873 is an apocalyptic number.

It is an amenable number.

80782873 is a deficient number, since it is larger than the sum of its proper divisors (1).

80782873 is an equidigital number, since it uses as much as digits as its factorization.

80782873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150528, while the sum is 43.

The square root of 80782873 is about 8987.9292943369. The cubic root of 80782873 is about 432.2879185626.

The spelling of 80782873 in words is "eighty million, seven hundred eighty-two thousand, eight hundred seventy-three".