9988797983 has 2 divisors, whose sum is σ = 9988797984. Its totient is φ = 9988797982.

The previous prime is 9988797941. The next prime is 9988797989. The reversal of 9988797983 is 3897978899.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9988797983 - 2¹⁰ = 9988796959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9988797989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4994398991 + 4994398992.

It is an arithmetic number, because the mean of its divisors is an integer number (4994398992).

Almost surely, 2^9988797983 is an apocalyptic number.

9988797983 is a deficient number, since it is larger than the sum of its proper divisors (1).

9988797983 is an equidigital number, since it uses as much as digits as its factorization.

9988797983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 493807104, while the sum is 77.

The square root of 9988797983 is about 99943.9742205602. The cubic root of 9988797983 is about 2153.6299223222.

The spelling of 9988797983 in words is "nine billion, nine hundred eighty-eight million, seven hundred ninety-seven thousand, nine hundred eighty-three".