80108729 has 2 divisors, whose sum is σ = 80108730. Its totient is φ = 80108728.

The previous prime is 80108719. The next prime is 80108783. The reversal of 80108729 is 92780108.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80066704 + 42025 = 8948^2 + 205^2 .

It is a cyclic number.

It is not a de Polignac number, because 80108729 - 2⁸ = 80108473 is a prime.

It is not a weakly prime, because it can be changed into another prime (80108719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40054364 + 40054365.

It is an arithmetic number, because the mean of its divisors is an integer number (40054365).

Almost surely, 2^80108729 is an apocalyptic number.

It is an amenable number.

80108729 is a deficient number, since it is larger than the sum of its proper divisors (1).

80108729 is an equidigital number, since it uses as much as digits as its factorization.

80108729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 80108729 is about 8950.3479820619. The cubic root of 80108729 is about 431.0820575778.

The spelling of 80108729 in words is "eighty million, one hundred eight thousand, seven hundred twenty-nine".