98719999 has 4 divisors (see below), whose sum is σ = 112822864. Its totient is φ = 84617136.

The previous prime is 98719997. The next prime is 98720009. The reversal of 98719999 is 99991789.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 98719999 - 2¹ = 98719997 is a prime.

98719999 is a modest number, since divided by 9999 gives 9871 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98719993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7051422 + ... + 7051435.

It is an arithmetic number, because the mean of its divisors is an integer number (28205716).

Almost surely, 2^98719999 is an apocalyptic number.

98719999 is a deficient number, since it is larger than the sum of its proper divisors (14102865).

98719999 is a wasteful number, since it uses less digits than its factorization.

98719999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14102864.

The product of its digits is 3306744, while the sum is 61.

The square root of 98719999 is about 9935.7938283763. The cubic root of 98719999 is about 462.1699602057.

The spelling of 98719999 in words is "ninety-eight million, seven hundred nineteen thousand, nine hundred ninety-nine".