103306821 has 16 divisors (see below), whose sum is σ = 139518720. Its totient is φ = 67988160.

The previous prime is 103306793. The next prime is 103306829. The reversal of 103306821 is 128603301.

It is not a de Polignac number, because 103306821 - 2⁵ = 103306789 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 103306791 and 103306800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103306829) 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 15 ways as a sum of consecutive naturals, for example, 140571 + ... + 141303.

It is an arithmetic number, because the mean of its divisors is an integer number (8719920).

Almost surely, 2^103306821 is an apocalyptic number.

It is an amenable number.

103306821 is a deficient number, since it is larger than the sum of its proper divisors (36211899).

103306821 is a wasteful number, since it uses less digits than its factorization.

103306821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 103306821 is about 10163.9963105070. The cubic root of 103306821 is about 469.2198026206.

The spelling of 103306821 in words is "one hundred three million, three hundred six thousand, eight hundred twenty-one".