80746709 has 2 divisors, whose sum is σ = 80746710. Its totient is φ = 80746708.

The previous prime is 80746703. The next prime is 80746711. The reversal of 80746709 is 90764708.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63648484 + 17098225 = 7978^2 + 4135^2 .

It is a cyclic number.

It is not a de Polignac number, because 80746709 - 2²⁰ = 79698133 is a prime.

Together with 80746711, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80746703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40373354 + 40373355.

It is an arithmetic number, because the mean of its divisors is an integer number (40373355).

Almost surely, 2^80746709 is an apocalyptic number.

It is an amenable number.

80746709 is a deficient number, since it is larger than the sum of its proper divisors (1).

80746709 is an equidigital number, since it uses as much as digits as its factorization.

80746709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 80746709 is about 8985.9172598016. The cubic root of 80746709 is about 432.2234016127.

The spelling of 80746709 in words is "eighty million, seven hundred forty-six thousand, seven hundred nine".