80706389 has 2 divisors, whose sum is σ = 80706390. Its totient is φ = 80706388.

The previous prime is 80706347. The next prime is 80706407. The reversal of 80706389 is 98360708.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80694289 + 12100 = 8983^2 + 110^2 .

It is a cyclic number.

It is not a de Polignac number, because 80706389 - 2²⁰ = 79657813 is a prime.

It is a super-3 number, since 3×80706389³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80706589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40353194 + 40353195.

It is an arithmetic number, because the mean of its divisors is an integer number (40353195).

Almost surely, 2^80706389 is an apocalyptic number.

It is an amenable number.

80706389 is a deficient number, since it is larger than the sum of its proper divisors (1).

80706389 is an equidigital number, since it uses as much as digits as its factorization.

80706389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 80706389 is about 8983.6734691328. The cubic root of 80706389 is about 432.1514476005.

The spelling of 80706389 in words is "eighty million, seven hundred six thousand, three hundred eighty-nine".