9998777443 has 4 divisors (see below), whose sum is σ = 10586940840. Its totient is φ = 9410614048.

The previous prime is 9998777429. The next prime is 9998777513. The reversal of 9998777443 is 3447778999.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9998777443 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (9998777743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294081673 + ... + 294081706.

It is an arithmetic number, because the mean of its divisors is an integer number (2646735210).

Almost surely, 2^9998777443 is an apocalyptic number.

9998777443 is a deficient number, since it is larger than the sum of its proper divisors (588163397).

9998777443 is a wasteful number, since it uses less digits than its factorization.

9998777443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588163396.

The product of its digits is 96018048, while the sum is 67.

The square root of 9998777443 is about 99993.8870281579. The cubic root of 9998777443 is about 2154.3468891467.

The spelling of 9998777443 in words is "nine billion, nine hundred ninety-eight million, seven hundred seventy-seven thousand, four hundred forty-three".