98999999999 has 2 divisors, whose sum is σ = 99000000000. Its totient is φ = 98999999998.

The previous prime is 98999999977. The next prime is 99000000031. The reversal of 98999999999 is 99999999989.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 98999999999 - 2²⁴ = 98983222783 is a prime.

98999999999 is a modest number, since divided by 999999 gives 98999 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98999999099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49499999999 + 49500000000.

It is an arithmetic number, because the mean of its divisors is an integer number (49500000000).

Almost surely, 2^98999999999 is an apocalyptic number.

98999999999 is a deficient number, since it is larger than the sum of its proper divisors (1).

98999999999 is an equidigital number, since it uses as much as digits as its factorization.

98999999999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27894275208, while the sum is 98.

The spelling of 98999999999 in words is "ninety-eight billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".