80399 has 4 divisors (see below), whose sum is σ = 87720. Its totient is φ = 73080.

The previous prime is 80387. The next prime is 80407. The reversal of 80399 is 99308.

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 80399 - 2¹² = 76303 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 (80309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3644 + ... + 3665.

It is an arithmetic number, because the mean of its divisors is an integer number (21930).

2⁸⁰³⁹⁹ is an apocalyptic number.

80399 is a deficient number, since it is larger than the sum of its proper divisors (7321).

80399 is a wasteful number, since it uses less digits than its factorization.

80399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7320.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 80399 is about 283.5471742056. The cubic root of 80399 is about 43.1602099899.

It can be divided in two parts, 803 and 99, that multiplied together give a palindrome (79497).

The spelling of 80399 in words is "eighty thousand, three hundred ninety-nine".