103990 has 8 divisors (see below), whose sum is σ = 187200. Its totient is φ = 41592.

The previous prime is 103981. The next prime is 103991. The reversal of 103990 is 99301.

103990 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103991) by changing a digit.

103990 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5190 + ... + 5209.

It is an arithmetic number, because the mean of its divisors is an integer number (23400).

2¹⁰³⁹⁹⁰ is an apocalyptic number.

103990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

103990 is a deficient number, since it is larger than the sum of its proper divisors (83210).

103990 is a wasteful number, since it uses less digits than its factorization.

103990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10406.

The product of its (nonzero) digits is 243, while the sum is 22.

The square root of 103990 is about 322.4748052174. The cubic root of 103990 is about 47.0251864403.

The spelling of 103990 in words is "one hundred three thousand, nine hundred ninety".