9988438601 has 2 divisors, whose sum is σ = 9988438602. Its totient is φ = 9988438600.

The previous prime is 9988438561. The next prime is 9988438657. The reversal of 9988438601 is 1068348899.

It is an a-pointer prime, because the next prime (9988438657) can be obtained adding 9988438601 to its sum of digits (56).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9025950025 + 962488576 = 95005^2 + 31024^2 .

It is a cyclic number.

It is not a de Polignac number, because 9988438601 - 2¹⁰ = 9988437577 is a prime.

It is not a weakly prime, because it can be changed into another prime (9988438001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4994219300 + 4994219301.

It is an arithmetic number, because the mean of its divisors is an integer number (4994219301).

Almost surely, 2^9988438601 is an apocalyptic number.

9988438601 is the 44696-th centered decagonal number.

It is an amenable number.

9988438601 is a deficient number, since it is larger than the sum of its proper divisors (1).

9988438601 is an equidigital number, since it uses as much as digits as its factorization.

9988438601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2985984, while the sum is 56.

The square root of 9988438601 is about 99942.1762870911. The cubic root of 9988438601 is about 2153.6040938855.

The spelling of 9988438601 in words is "nine billion, nine hundred eighty-eight million, four hundred thirty-eight thousand, six hundred one".