9920403 has 24 divisors (see below), whose sum is σ = 15207296. Its totient is φ = 6227280.

The previous prime is 9920399. The next prime is 9920411. The reversal of 9920403 is 3040299.

It is not a de Polignac number, because 9920403 - 2² = 9920399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9920423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 268101 + ... + 268137.

Almost surely, 2^9920403 is an apocalyptic number.

9920403 is a gapful number since it is divisible by the number (93) formed by its first and last digit.

9920403 is a deficient number, since it is larger than the sum of its proper divisors (5286893).

9920403 is an equidigital number, since it uses as much as digits as its factorization.

9920403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 9920403 is about 3149.6671252690. The cubic root of 9920403 is about 214.8703238213.

It can be divided in two parts, 99 and 20403, that added together give a palindrome (20502).

The spelling of 9920403 in words is "nine million, nine hundred twenty thousand, four hundred three".