80565893 has 2 divisors, whose sum is σ = 80565894. Its totient is φ = 80565892.

The previous prime is 80565889. The next prime is 80565911. The reversal of 80565893 is 39856508.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53919649 + 26646244 = 7343^2 + 5162^2 .

It is a cyclic number.

It is not a de Polignac number, because 80565893 - 2² = 80565889 is a prime.

It is a super-2 number, since 2×80565893² = 12981726229774898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80565493) 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, 40282946 + 40282947.

It is an arithmetic number, because the mean of its divisors is an integer number (40282947).

Almost surely, 2^80565893 is an apocalyptic number.

It is an amenable number.

80565893 is a deficient number, since it is larger than the sum of its proper divisors (1).

80565893 is an equidigital number, since it uses as much as digits as its factorization.

80565893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 80565893 is about 8975.8505446559. The cubic root of 80565893 is about 431.9005347280.

The spelling of 80565893 in words is "eighty million, five hundred sixty-five thousand, eight hundred ninety-three".