99998659 has 4 divisors (see below), whose sum is σ = 100174360. Its totient is φ = 99822960.

The previous prime is 99998611. The next prime is 99998663. The reversal of 99998659 is 95689999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95689999 = 179 ⋅534581.

It is a cyclic number.

It is not a de Polignac number, because 99998659 - 2⁹ = 99998147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99998659.

It is not an unprimeable number, because it can be changed into a prime (99998609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86994 + ... + 88135.

It is an arithmetic number, because the mean of its divisors is an integer number (25043590).

Almost surely, 2^99998659 is an apocalyptic number.

99998659 is a deficient number, since it is larger than the sum of its proper divisors (175701).

99998659 is a wasteful number, since it uses less digits than its factorization.

99998659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175700.

The product of its digits is 14171760, while the sum is 64.

The square root of 99998659 is about 9999.9329497752. The cubic root of 99998659 is about 464.1568085618.

The spelling of 99998659 in words is "ninety-nine million, nine hundred ninety-eight thousand, six hundred fifty-nine".