80876729 has 2 divisors, whose sum is σ = 80876730. Its totient is φ = 80876728.

The previous prime is 80876693. The next prime is 80876743. The reversal of 80876729 is 92767808.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74425129 + 6451600 = 8627^2 + 2540^2 .

It is a cyclic number.

It is not a de Polignac number, because 80876729 - 2²⁰ = 79828153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80876759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40438364 + 40438365.

It is an arithmetic number, because the mean of its divisors is an integer number (40438365).

Almost surely, 2^80876729 is an apocalyptic number.

It is an amenable number.

80876729 is a deficient number, since it is larger than the sum of its proper divisors (1).

80876729 is an equidigital number, since it uses as much as digits as its factorization.

80876729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 80876729 is about 8993.1490035471. The cubic root of 80876729 is about 432.4552688544.

The spelling of 80876729 in words is "eighty million, eight hundred seventy-six thousand, seven hundred twenty-nine".