9983845987 has 2 divisors, whose sum is σ = 9983845988. Its totient is φ = 9983845986.

The previous prime is 9983845951. The next prime is 9983846017. The reversal of 9983845987 is 7895483899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9983845987 - 2¹¹ = 9983843939 is a prime.

It is not a weakly prime, because it can be changed into another prime (9983845687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4991922993 + 4991922994.

It is an arithmetic number, because the mean of its divisors is an integer number (4991922994).

Almost surely, 2^9983845987 is an apocalyptic number.

9983845987 is a deficient number, since it is larger than the sum of its proper divisors (1).

9983845987 is an equidigital number, since it uses as much as digits as its factorization.

9983845987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 156764160, while the sum is 70.

The square root of 9983845987 is about 99919.1972896100. The cubic root of 9983845987 is about 2153.2739725995.

The spelling of 9983845987 in words is "nine billion, nine hundred eighty-three million, eight hundred forty-five thousand, nine hundred eighty-seven".