80849911 has 4 divisors (see below), whose sum is σ = 80874072. Its totient is φ = 80825752.

The previous prime is 80849897. The next prime is 80849981. The reversal of 80849911 is 11994808.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 80849911 - 2¹¹ = 80847863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80849981) 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 3 ways as a sum of consecutive naturals, for example, 6061 + ... + 14086.

It is an arithmetic number, because the mean of its divisors is an integer number (20218518).

Almost surely, 2^80849911 is an apocalyptic number.

80849911 is a deficient number, since it is larger than the sum of its proper divisors (24161).

80849911 is a wasteful number, since it uses less digits than its factorization.

80849911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24160.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 80849911 is about 8991.6578560352. The cubic root of 80849911 is about 432.4074641370.

The spelling of 80849911 in words is "eighty million, eight hundred forty-nine thousand, nine hundred eleven".