80400029 has 2 divisors, whose sum is σ = 80400030. Its totient is φ = 80400028.

The previous prime is 80400011. The next prime is 80400059. The reversal of 80400029 is 92000408.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65205625 + 15194404 = 8075^2 + 3898^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80400029 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 80399977 and 80400013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80400059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40200014 + 40200015.

It is an arithmetic number, because the mean of its divisors is an integer number (40200015).

Almost surely, 2^80400029 is an apocalyptic number.

It is an amenable number.

80400029 is a deficient number, since it is larger than the sum of its proper divisors (1).

80400029 is an equidigital number, since it uses as much as digits as its factorization.

80400029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 80400029 is about 8966.6063256954. The cubic root of 80400029 is about 431.6039412013.

The spelling of 80400029 in words is "eighty million, four hundred thousand, twenty-nine".