80805493 has 2 divisors, whose sum is σ = 80805494. Its totient is φ = 80805492.

The previous prime is 80805481. The next prime is 80805497. The reversal of 80805493 is 39450808.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79602084 + 1203409 = 8922^2 + 1097^2 .

It is a cyclic number.

It is not a de Polignac number, because 80805493 - 2²¹ = 78708341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80805497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40402746 + 40402747.

It is an arithmetic number, because the mean of its divisors is an integer number (40402747).

Almost surely, 2^80805493 is an apocalyptic number.

It is an amenable number.

80805493 is a deficient number, since it is larger than the sum of its proper divisors (1).

80805493 is an equidigital number, since it uses as much as digits as its factorization.

80805493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 80805493 is about 8989.1875606197. The cubic root of 80805493 is about 432.3282630887.

The spelling of 80805493 in words is "eighty million, eight hundred five thousand, four hundred ninety-three".