100003921 has 8 divisors (see below), whose sum is σ = 102291840. Its totient is φ = 97722768.

The previous prime is 100003913. The next prime is 100003927. The reversal of 100003921 is 129300001.

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

It is a cyclic number.

It is not a de Polignac number, because 100003921 - 2³ = 100003913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100003895 and 100003904.

It is not an unprimeable number, because it can be changed into a prime (100003927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39135 + ... + 41611.

It is an arithmetic number, because the mean of its divisors is an integer number (12786480).

Almost surely, 2^100003921 is an apocalyptic number.

It is an amenable number.

100003921 is a deficient number, since it is larger than the sum of its proper divisors (2287919).

100003921 is an equidigital number, since it uses as much as digits as its factorization.

100003921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3383.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 100003921 is about 10000.1960480783. The cubic root of 100003921 is about 464.1649498386.

Adding to 100003921 its reverse (129300001), we get a palindrome (229303922).

The spelling of 100003921 in words is "one hundred million, three thousand, nine hundred twenty-one".