80899 has 12 divisors (see below), whose sum is σ = 102144. Its totient is φ = 63504.

The previous prime is 80897. The next prime is 80909. The reversal of 80899 is 99808.

80899 = T₁₀₅ + T₁₀₆ + ... + T₁₁₇.

It is not a de Polignac number, because 80899 - 2¹ = 80897 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 574 + ... + 700.

It is an arithmetic number, because the mean of its divisors is an integer number (8512).

2⁸⁰⁸⁹⁹ is an apocalyptic number.

80899 is a deficient number, since it is larger than the sum of its proper divisors (21245).

80899 is a wasteful number, since it uses less digits than its factorization.

80899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 80899 is about 284.4274951547. The cubic root of 80899 is about 43.2494960236.

It can be divided in two parts, 80 and 899, that added together give a palindrome (979).

The spelling of 80899 in words is "eighty thousand, eight hundred ninety-nine".