80861273 has 2 divisors, whose sum is σ = 80861274. Its totient is φ = 80861272.

The previous prime is 80861239. The next prime is 80861293. The reversal of 80861273 is 37216808.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73479184 + 7382089 = 8572^2 + 2717^2 .

It is a cyclic number.

It is not a de Polignac number, because 80861273 - 2¹² = 80857177 is a prime.

It is not a weakly prime, because it can be changed into another prime (80861213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40430636 + 40430637.

It is an arithmetic number, because the mean of its divisors is an integer number (40430637).

Almost surely, 2^80861273 is an apocalyptic number.

It is an amenable number.

80861273 is a deficient number, since it is larger than the sum of its proper divisors (1).

80861273 is an equidigital number, since it uses as much as digits as its factorization.

80861273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 80861273 is about 8992.2896416875. The cubic root of 80861273 is about 432.4277188840.

The spelling of 80861273 in words is "eighty million, eight hundred sixty-one thousand, two hundred seventy-three".