100921403 has 8 divisors (see below), whose sum is σ = 110189376. Its totient is φ = 91669000.

The previous prime is 100921397. The next prime is 100921411. The reversal of 100921403 is 304129001.

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 100921403 - 2⁸ = 100921147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100921463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12800 + ... + 19122.

It is an arithmetic number, because the mean of its divisors is an integer number (13773672).

Almost surely, 2^100921403 is an apocalyptic number.

100921403 is a deficient number, since it is larger than the sum of its proper divisors (9267973).

100921403 is a wasteful number, since it uses less digits than its factorization.

100921403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7785.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 100921403 is about 10045.9645131764. The cubic root of 100921403 is about 465.5801184493.

The spelling of 100921403 in words is "one hundred million, nine hundred twenty-one thousand, four hundred three".