80520173 has 2 divisors, whose sum is σ = 80520174. Its totient is φ = 80520172.

The previous prime is 80520163. The next prime is 80520199. The reversal of 80520173 is 37102508.

It is an a-pointer prime, because the next prime (80520199) can be obtained adding 80520173 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77123524 + 3396649 = 8782^2 + 1843^2 .

It is a cyclic number.

It is not a de Polignac number, because 80520173 - 2⁸ = 80519917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80520163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40260086 + 40260087.

It is an arithmetic number, because the mean of its divisors is an integer number (40260087).

Almost surely, 2^80520173 is an apocalyptic number.

It is an amenable number.

80520173 is a deficient number, since it is larger than the sum of its proper divisors (1).

80520173 is an equidigital number, since it uses as much as digits as its factorization.

80520173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 80520173 is about 8973.3033493803. The cubic root of 80520173 is about 431.8188201290.

The spelling of 80520173 in words is "eighty million, five hundred twenty thousand, one hundred seventy-three".