83906 has 4 divisors (see below), whose sum is σ = 125862. Its totient is φ = 41952.

The previous prime is 83903. The next prime is 83911. The reversal of 83906 is 60938.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60938 = 2 ⋅30469.

It can be written as a sum of positive squares in only one way, i.e., 75625 + 8281 = 275^2 + 91^2 .

It is not an unprimeable number, because it can be changed into a prime (83903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20975 + ... + 20978.

2⁸³⁹⁰⁶ is an apocalyptic number.

83906 is a deficient number, since it is larger than the sum of its proper divisors (41956).

83906 is a wasteful number, since it uses less digits than its factorization.

83906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41955.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 83906 is about 289.6653241242. The cubic root of 83906 is about 43.7788489998.

It can be divided in two parts, 83 and 906, that added together give a palindrome (989).

The spelling of 83906 in words is "eighty-three thousand, nine hundred six".