99998555 has 8 divisors (see below), whose sum is σ = 120120000. Its totient is φ = 79917696.

The previous prime is 99998551. The next prime is 99998557. The reversal of 99998555 is 55589999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99998555 - 2² = 99998551 is a prime.

It is a super-2 number, since 2×99998555² = 19999422004176050, which contains 22 as substring.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 99998494 and 99998503.

It is not an unprimeable number, because it can be changed into a prime (99998551) 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 in 7 ways as a sum of consecutive naturals, for example, 4430 + ... + 14819.

It is an arithmetic number, because the mean of its divisors is an integer number (15015000).

Almost surely, 2^99998555 is an apocalyptic number.

99998555 is a deficient number, since it is larger than the sum of its proper divisors (20121445).

99998555 is a wasteful number, since it uses less digits than its factorization.

99998555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20293.

The product of its digits is 6561000, while the sum is 59.

The square root of 99998555 is about 9999.9277497390. The cubic root of 99998555 is about 464.1566476519.

The spelling of 99998555 in words is "ninety-nine million, nine hundred ninety-eight thousand, five hundred fifty-five".