9985929641 has 2 divisors, whose sum is σ = 9985929642. Its totient is φ = 9985929640.

The previous prime is 9985929637. The next prime is 9985929677. The reversal of 9985929641 is 1469295899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5238719641 + 4747210000 = 72379^2 + 68900^2 .

It is an emirp because it is prime and its reverse (1469295899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9985929641 - 2² = 9985929637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (9985929841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4992964820 + 4992964821.

It is an arithmetic number, because the mean of its divisors is an integer number (4992964821).

Almost surely, 2^9985929641 is an apocalyptic number.

It is an amenable number.

9985929641 is a deficient number, since it is larger than the sum of its proper divisors (1).

9985929641 is an equidigital number, since it uses as much as digits as its factorization.

9985929641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12597120, while the sum is 62.

The square root of 9985929641 is about 99929.6234406995. The cubic root of 9985929641 is about 2153.4237600943.

The spelling of 9985929641 in words is "nine billion, nine hundred eighty-five million, nine hundred twenty-nine thousand, six hundred forty-one".