103388421 has 4 divisors (see below), whose sum is σ = 137851232. Its totient is φ = 68925612.

The previous prime is 103388401. The next prime is 103388447. The reversal of 103388421 is 124883301.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124883301 = 3 ⋅41627767.

It is not a de Polignac number, because 103388421 - 2⁹ = 103387909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103388401) 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 3 ways as a sum of consecutive naturals, for example, 17231401 + ... + 17231406.

It is an arithmetic number, because the mean of its divisors is an integer number (34462808).

Almost surely, 2^103388421 is an apocalyptic number.

It is an amenable number.

103388421 is a deficient number, since it is larger than the sum of its proper divisors (34462811).

103388421 is an equidigital number, since it uses as much as digits as its factorization.

103388421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34462810.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 103388421 is about 10168.0096872495. The cubic root of 103388421 is about 469.3433125654.

The spelling of 103388421 in words is "one hundred three million, three hundred eighty-eight thousand, four hundred twenty-one".