99984375 has 70 divisors (see below), whose sum is σ = 189060080. Its totient is φ = 52650000.

The previous prime is 99984371. The next prime is 99984383. The reversal of 99984375 is 57348999.

It is not a de Polignac number, because 99984375 - 2² = 99984371 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99984371) 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 69 ways as a sum of consecutive naturals, for example, 1265586 + ... + 1265664.

Almost surely, 2^99984375 is an apocalyptic number.

99984375 is a deficient number, since it is larger than the sum of its proper divisors (89075705).

99984375 is an frugal number, since it uses more digits than its factorization.

99984375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121 (or 87 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 99984375 is about 9999.2187194800. The cubic root of 99984375 is about 464.1347071602.

The spelling of 99984375 in words is "ninety-nine million, nine hundred eighty-four thousand, three hundred seventy-five".