103999506 has 64 divisors (see below), whose sum is σ = 239718528. Its totient is φ = 29795328.

The previous prime is 103999501. The next prime is 103999507. The reversal of 103999506 is 605999301.

It is not an unprimeable number, because it can be changed into a prime (103999501) 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 31 ways as a sum of consecutive naturals, for example, 141516 + ... + 142248.

It is an arithmetic number, because the mean of its divisors is an integer number (3745602).

Almost surely, 2^103999506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 103999506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119859264).

103999506 is an abundant number, since it is smaller than the sum of its proper divisors (135719022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

103999506 is a wasteful number, since it uses less digits than its factorization.

103999506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875.

The product of its (nonzero) digits is 65610, while the sum is 42.

The square root of 103999506 is about 10198.0148068141. The cubic root of 103999506 is about 470.2661929537.

The spelling of 103999506 in words is "one hundred three million, nine hundred ninety-nine thousand, five hundred six".