80707309 has 2 divisors, whose sum is σ = 80707310. Its totient is φ = 80707308.

The previous prime is 80707283. The next prime is 80707343. The reversal of 80707309 is 90370708.

It is an a-pointer prime, because the next prime (80707343) can be obtained adding 80707309 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53978409 + 26728900 = 7347^2 + 5170^2 .

It is a cyclic number.

It is not a de Polignac number, because 80707309 - 2¹³ = 80699117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80707349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40353654 + 40353655.

It is an arithmetic number, because the mean of its divisors is an integer number (40353655).

Almost surely, 2^80707309 is an apocalyptic number.

It is an amenable number.

80707309 is a deficient number, since it is larger than the sum of its proper divisors (1).

80707309 is an equidigital number, since it uses as much as digits as its factorization.

80707309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 80707309 is about 8983.7246729850. The cubic root of 80707309 is about 432.1530896755.

The spelling of 80707309 in words is "eighty million, seven hundred seven thousand, three hundred nine".