9899699137 has 2 divisors, whose sum is σ = 9899699138. Its totient is φ = 9899699136.

The previous prime is 9899699093. The next prime is 9899699167. The reversal of 9899699137 is 7319969989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9131522481 + 768176656 = 95559^2 + 27716^2 .

It is an emirp because it is prime and its reverse (7319969989) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9899699137 - 2⁷ = 9899699009 is a prime.

It is not a weakly prime, because it can be changed into another prime (9899699167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4949849568 + 4949849569.

It is an arithmetic number, because the mean of its divisors is an integer number (4949849569).

Almost surely, 2^9899699137 is an apocalyptic number.

It is an amenable number.

9899699137 is a deficient number, since it is larger than the sum of its proper divisors (1).

9899699137 is an equidigital number, since it uses as much as digits as its factorization.

9899699137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 59521392, while the sum is 70.

The square root of 9899699137 is about 99497.2318057141. The cubic root of 9899699137 is about 2147.2074172225.

The spelling of 9899699137 in words is "nine billion, eight hundred ninety-nine million, six hundred ninety-nine thousand, one hundred thirty-seven".