80865101 has 2 divisors, whose sum is σ = 80865102. Its totient is φ = 80865100.

The previous prime is 80865089. The next prime is 80865139. The reversal of 80865101 is 10156808.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50779876 + 30085225 = 7126^2 + 5485^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80865101 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80862101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40432550 + 40432551.

It is an arithmetic number, because the mean of its divisors is an integer number (40432551).

Almost surely, 2^80865101 is an apocalyptic number.

It is an amenable number.

80865101 is a deficient number, since it is larger than the sum of its proper divisors (1).

80865101 is an equidigital number, since it uses as much as digits as its factorization.

80865101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 80865101 is about 8992.5024881843. The cubic root of 80865101 is about 432.4345425345.

The spelling of 80865101 in words is "eighty million, eight hundred sixty-five thousand, one hundred one".