9819939011 has 2 divisors, whose sum is σ = 9819939012. Its totient is φ = 9819939010.

The previous prime is 9819938993. The next prime is 9819939047. The reversal of 9819939011 is 1109399189.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9819939011 is a prime.

It is not a weakly prime, because it can be changed into another prime (9819939061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4909969505 + 4909969506.

It is an arithmetic number, because the mean of its divisors is an integer number (4909969506).

Almost surely, 2^9819939011 is an apocalyptic number.

9819939011 is a deficient number, since it is larger than the sum of its proper divisors (1).

9819939011 is an equidigital number, since it uses as much as digits as its factorization.

9819939011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 157464, while the sum is 50.

The square root of 9819939011 is about 99095.6054071017. The cubic root of 9819939011 is about 2141.4253039516.

The spelling of 9819939011 in words is "nine billion, eight hundred nineteen million, nine hundred thirty-nine thousand, eleven".