80918573 has 2 divisors, whose sum is σ = 80918574. Its totient is φ = 80918572.

The previous prime is 80918567. The next prime is 80918597. The reversal of 80918573 is 37581908.

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., 67683529 + 13235044 = 8227^2 + 3638^2 .

It is a cyclic number.

It is not a de Polignac number, because 80918573 - 2⁴ = 80918557 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80918573.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80918503) 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, 40459286 + 40459287.

It is an arithmetic number, because the mean of its divisors is an integer number (40459287).

Almost surely, 2^80918573 is an apocalyptic number.

It is an amenable number.

80918573 is a deficient number, since it is larger than the sum of its proper divisors (1).

80918573 is an equidigital number, since it uses as much as digits as its factorization.

80918573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 80918573 is about 8995.4751403136. The cubic root of 80918573 is about 432.5298372279.

The spelling of 80918573 in words is "eighty million, nine hundred eighteen thousand, five hundred seventy-three".