9998909659 has 2 divisors, whose sum is σ = 9998909660. Its totient is φ = 9998909658.

The previous prime is 9998909629. The next prime is 9998909689. The reversal of 9998909659 is 9569098999.

It is a balanced prime because it is at equal distance from previous prime (9998909629) and next prime (9998909689).

It is a cyclic number.

It is not a de Polignac number, because 9998909659 - 2¹⁵ = 9998876891 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9998909591 and 9998909600.

It is not a weakly prime, because it can be changed into another prime (9998909629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999454829 + 4999454830.

It is an arithmetic number, because the mean of its divisors is an integer number (4999454830).

Almost surely, 2^9998909659 is an apocalyptic number.

9998909659 is a deficient number, since it is larger than the sum of its proper divisors (1).

9998909659 is an equidigital number, since it uses as much as digits as its factorization.

9998909659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127545840, while the sum is 73.

The square root of 9998909659 is about 99994.5481463865. The cubic root of 9998909659 is about 2154.3563849034.

The spelling of 9998909659 in words is "nine billion, nine hundred ninety-eight million, nine hundred nine thousand, six hundred fifty-nine".