9921200983 has 2 divisors, whose sum is σ = 9921200984. Its totient is φ = 9921200982.

The previous prime is 9921200957. The next prime is 9921201023. The reversal of 9921200983 is 3890021299.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9921200983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9921200923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4960600491 + 4960600492.

It is an arithmetic number, because the mean of its divisors is an integer number (4960600492).

Almost surely, 2^9921200983 is an apocalyptic number.

9921200983 is a deficient number, since it is larger than the sum of its proper divisors (1).

9921200983 is an equidigital number, since it uses as much as digits as its factorization.

9921200983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 9921200983 is about 99605.2256811860. The cubic root of 9921200983 is about 2148.7608495379.

The spelling of 9921200983 in words is "nine billion, nine hundred twenty-one million, two hundred thousand, nine hundred eighty-three".