83990 has 16 divisors (see below), whose sum is σ = 155952. Its totient is φ = 32544.

The previous prime is 83987. The next prime is 84011. The reversal of 83990 is 9938.

83990 = T₂₀ + T₂₁ + ... + T₇₉.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257 + ... + 483.

It is an arithmetic number, because the mean of its divisors is an integer number (9747).

2⁸³⁹⁹⁰ is an apocalyptic number.

83990 is a deficient number, since it is larger than the sum of its proper divisors (71962).

83990 is a wasteful number, since it uses less digits than its factorization.

83990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271.

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

The square root of 83990 is about 289.8102827713. The cubic root of 83990 is about 43.7934534255.

It can be divided in two parts, 839 and 90, that added together give a palindrome (929).

The spelling of 83990 in words is "eighty-three thousand, nine hundred ninety".