9900427 has 2 divisors, whose sum is σ = 9900428. Its totient is φ = 9900426.

The previous prime is 9900421. The next prime is 9900437. The reversal of 9900427 is 7240099.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9900427 - 2¹⁵ = 9867659 is a prime.

It is not a weakly prime, because it can be changed into another prime (9900421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4950213 + 4950214.

It is an arithmetic number, because the mean of its divisors is an integer number (4950214).

Almost surely, 2^9900427 is an apocalyptic number.

9900427 is a deficient number, since it is larger than the sum of its proper divisors (1).

9900427 is an equidigital number, since it uses as much as digits as its factorization.

9900427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 9900427 is about 3146.4943985331. The cubic root of 9900427 is about 214.7260039513.

The spelling of 9900427 in words is "nine million, nine hundred thousand, four hundred twenty-seven".