80865319 has 2 divisors, whose sum is σ = 80865320. Its totient is φ = 80865318.

The previous prime is 80865299. The next prime is 80865331. The reversal of 80865319 is 91356808.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80865319 - 2¹⁵ = 80832551 is a prime.

It is a super-2 number, since 2×80865319² = 13078399633943522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80865419) 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, 40432659 + 40432660.

It is an arithmetic number, because the mean of its divisors is an integer number (40432660).

Almost surely, 2^80865319 is an apocalyptic number.

80865319 is a deficient number, since it is larger than the sum of its proper divisors (1).

80865319 is an equidigital number, since it uses as much as digits as its factorization.

80865319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 80865319 is about 8992.5146093849. The cubic root of 80865319 is about 432.4349311267.

The spelling of 80865319 in words is "eighty million, eight hundred sixty-five thousand, three hundred nineteen".