99984555 has 48 divisors (see below), whose sum is σ = 199031040. Its totient is φ = 45921600.

The previous prime is 99984541. The next prime is 99984559. The reversal of 99984555 is 55548999.

99984555 is a `hidden beast` number, since 9 + 9 + 9 + 84 + 555 = 666.

It is not a de Polignac number, because 99984555 - 2⁶ = 99984491 is a prime.

It is a super-2 number, since 2×99984555² = 19993822477096050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99984559) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4090 + ... + 14720.

It is an arithmetic number, because the mean of its divisors is an integer number (4146480).

Almost surely, 2^99984555 is an apocalyptic number.

99984555 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

99984555 is a deficient number, since it is larger than the sum of its proper divisors (99046485).

99984555 is a wasteful number, since it uses less digits than its factorization.

99984555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10672 (or 10669 counting only the distinct ones).

The product of its digits is 2916000, while the sum is 54.

The square root of 99984555 is about 9999.2277201792. The cubic root of 99984555 is about 464.1349856844.

Subtracting from 99984555 its reverse (55548999), we obtain a square (44435556 = 6666²).

The spelling of 99984555 in words is "ninety-nine million, nine hundred eighty-four thousand, five hundred fifty-five".