9990403 has 2 divisors, whose sum is σ = 9990404. Its totient is φ = 9990402.

The previous prime is 9990389. The next prime is 9990457. The reversal of 9990403 is 3040999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9990403 - 2¹³ = 9982211 is a prime.

It is not a weakly prime, because it can be changed into another prime (9990473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4995201 + 4995202.

It is an arithmetic number, because the mean of its divisors is an integer number (4995202).

Almost surely, 2^9990403 is an apocalyptic number.

9990403 is a deficient number, since it is larger than the sum of its proper divisors (1).

9990403 is an equidigital number, since it uses as much as digits as its factorization.

9990403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 9990403 is about 3160.7598769916. The cubic root of 9990403 is about 215.3745265781.

The spelling of 9990403 in words is "nine million, nine hundred ninety thousand, four hundred three".