9921403 has 8 divisors (see below), whose sum is σ = 10085040. Its totient is φ = 9759360.

The previous prime is 9921391. The next prime is 9921407. The reversal of 9921403 is 3041299.

It is a happy number.

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 9921403 - 2¹⁷ = 9790331 is a prime.

It is a Duffinian number.

9921403 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9921407) 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, 18783 + ... + 19303.

It is an arithmetic number, because the mean of its divisors is an integer number (1260630).

Almost surely, 2^9921403 is an apocalyptic number.

9921403 is a deficient number, since it is larger than the sum of its proper divisors (163637).

9921403 is a wasteful number, since it uses less digits than its factorization.

9921403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 9921403 is about 3149.8258682029. The cubic root of 9921403 is about 214.8775433904.

The spelling of 9921403 in words is "nine million, nine hundred twenty-one thousand, four hundred three".