80439449 has 2 divisors, whose sum is σ = 80439450. Its totient is φ = 80439448.

The previous prime is 80439433. The next prime is 80439523. The reversal of 80439449 is 94493408.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80227849 + 211600 = 8957^2 + 460^2 .

It is a cyclic number.

It is not a de Polignac number, because 80439449 - 2⁴ = 80439433 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80439949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40219724 + 40219725.

It is an arithmetic number, because the mean of its divisors is an integer number (40219725).

Almost surely, 2^80439449 is an apocalyptic number.

It is an amenable number.

80439449 is a deficient number, since it is larger than the sum of its proper divisors (1).

80439449 is an equidigital number, since it uses as much as digits as its factorization.

80439449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 80439449 is about 8968.8042123797. The cubic root of 80439449 is about 431.6744679068.

The spelling of 80439449 in words is "eighty million, four hundred thirty-nine thousand, four hundred forty-nine".