80725973 has 2 divisors, whose sum is σ = 80725974. Its totient is φ = 80725972.

The previous prime is 80725969. The next prime is 80725987. The reversal of 80725973 is 37952708.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80694289 + 31684 = 8983^2 + 178^2 .

It is a cyclic number.

It is not a de Polignac number, because 80725973 - 2² = 80725969 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 80725973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80725903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40362986 + 40362987.

It is an arithmetic number, because the mean of its divisors is an integer number (40362987).

Almost surely, 2^80725973 is an apocalyptic number.

It is an amenable number.

80725973 is a deficient number, since it is larger than the sum of its proper divisors (1).

80725973 is an equidigital number, since it uses as much as digits as its factorization.

80725973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 80725973 is about 8984.7633803011. The cubic root of 80725973 is about 432.1863996846.

The spelling of 80725973 in words is "eighty million, seven hundred twenty-five thousand, nine hundred seventy-three".