80606905 has 16 divisors (see below), whose sum is σ = 101229264. Its totient is φ = 61551360.

The previous prime is 80606899. The next prime is 80606909. The reversal of 80606905 is 50960608.

80606905 = 6348² + 6349².

It can be written as a sum of positive squares in 8 ways, for example, as 21455424 + 59151481 = 4632^2 + 7691^2 .

It is not a de Polignac number, because 80606905 - 2⁷ = 80606777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80606909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5695 + ... + 13915.

It is an arithmetic number, because the mean of its divisors is an integer number (6326829).

Almost surely, 2^80606905 is an apocalyptic number.

80606905 is the 6349-th centered square number.

It is an amenable number.

80606905 is a deficient number, since it is larger than the sum of its proper divisors (20622359).

80606905 is a wasteful number, since it uses less digits than its factorization.

80606905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8316.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 80606905 is about 8978.1348285710. The cubic root of 80606905 is about 431.9738084972.

The spelling of 80606905 in words is "eighty million, six hundred six thousand, nine hundred five".