80849905 has 8 divisors (see below), whose sum is σ = 98468352. Its totient is φ = 63714288.

The previous prime is 80849897. The next prime is 80849981. The reversal of 80849905 is 50994808.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80849905 - 2³ = 80849897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120337 + ... + 121006.

It is an arithmetic number, because the mean of its divisors is an integer number (12308544).

Almost surely, 2^80849905 is an apocalyptic number.

It is an amenable number.

80849905 is a deficient number, since it is larger than the sum of its proper divisors (17618447).

80849905 is a wasteful number, since it uses less digits than its factorization.

80849905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241415.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 80849905 is about 8991.6575223926. The cubic root of 80849905 is about 432.4074534405.

The spelling of 80849905 in words is "eighty million, eight hundred forty-nine thousand, nine hundred five".