9906399983 has 2 divisors, whose sum is σ = 9906399984. Its totient is φ = 9906399982.

The previous prime is 9906399977. The next prime is 9906400003. The reversal of 9906399983 is 3899936099.

9906399983 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (3899936099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9906399983 - 2¹² = 9906395887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9906399583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4953199991 + 4953199992.

It is an arithmetic number, because the mean of its divisors is an integer number (4953199992).

Almost surely, 2^9906399983 is an apocalyptic number.

9906399983 is a deficient number, since it is larger than the sum of its proper divisors (1).

9906399983 is an equidigital number, since it uses as much as digits as its factorization.

9906399983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25509168, while the sum is 65.

The square root of 9906399983 is about 99530.8996392578. The cubic root of 9906399983 is about 2147.6917707011.

The spelling of 9906399983 in words is "nine billion, nine hundred six million, three hundred ninety-nine thousand, nine hundred eighty-three".