9899655739 has 2 divisors, whose sum is σ = 9899655740. Its totient is φ = 9899655738.

The previous prime is 9899655737. The next prime is 9899655761. The reversal of 9899655739 is 9375569989.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9899655739 - 2¹ = 9899655737 is a prime.

It is a super-2 number, since 2×9899655739² (a number of 21 digits) contains 22 as substring.

Together with 9899655737, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (9899655737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4949827869 + 4949827870.

It is an arithmetic number, because the mean of its divisors is an integer number (4949827870).

Almost surely, 2^9899655739 is an apocalyptic number.

9899655739 is a deficient number, since it is larger than the sum of its proper divisors (1).

9899655739 is an equidigital number, since it uses as much as digits as its factorization.

9899655739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165337200, while the sum is 70.

The square root of 9899655739 is about 99497.0137190057. The cubic root of 9899655739 is about 2147.2042795971.

The spelling of 9899655739 in words is "nine billion, eight hundred ninety-nine million, six hundred fifty-five thousand, seven hundred thirty-nine".