80447705 has 16 divisors (see below), whose sum is σ = 104369664. Its totient is φ = 59175360.

The previous prime is 80447701. The next prime is 80447707. The reversal of 80447705 is 50774408.

It is a happy number.

It is not a de Polignac number, because 80447705 - 2² = 80447701 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80447701) 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 in 15 ways as a sum of consecutive naturals, for example, 15332 + ... + 19898.

It is an arithmetic number, because the mean of its divisors is an integer number (6523104).

Almost surely, 2^80447705 is an apocalyptic number.

It is an amenable number.

80447705 is a deficient number, since it is larger than the sum of its proper divisors (23921959).

80447705 is a wasteful number, since it uses less digits than its factorization.

80447705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4856.

The product of its (nonzero) digits is 31360, while the sum is 35.

The square root of 80447705 is about 8969.2644625967. The cubic root of 80447705 is about 431.6892358783.

The spelling of 80447705 in words is "eighty million, four hundred forty-seven thousand, seven hundred five".