83899 has 4 divisors (see below), whose sum is σ = 85536. Its totient is φ = 82264.

The previous prime is 83891. The next prime is 83903. The reversal of 83899 is 99838.

83899 = T₂₃₅ + T₂₃₆ + T₂₃₇.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99838 = 2 ⋅49919.

It is a cyclic number.

It is not a de Polignac number, because 83899 - 2³ = 83891 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (83891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 739 + ... + 844.

It is an arithmetic number, because the mean of its divisors is an integer number (21384).

2⁸³⁸⁹⁹ is an apocalyptic number.

83899 is the 237-th centered triangular number.

83899 is a deficient number, since it is larger than the sum of its proper divisors (1637).

83899 is a wasteful number, since it uses less digits than its factorization.

83899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636.

The product of its digits is 15552, while the sum is 37.

The square root of 83899 is about 289.6532409624. The cubic root of 83899 is about 43.7776315245. Note that the first 3 decimals are identical.

The spelling of 83899 in words is "eighty-three thousand, eight hundred ninety-nine".