99998523 has 8 divisors (see below), whose sum is σ = 148146000. Its totient is φ = 66665664.

The previous prime is 99998513. The next prime is 99998543. The reversal of 99998523 is 32589999.

It is not a de Polignac number, because 99998523 - 2⁵ = 99998491 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99998523.

It is not an unprimeable number, because it can be changed into a prime (99998513) 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, 1851798 + ... + 1851851.

It is an arithmetic number, because the mean of its divisors is an integer number (18518250).

Almost surely, 2^99998523 is an apocalyptic number.

99998523 is a deficient number, since it is larger than the sum of its proper divisors (48147477).

99998523 is a wasteful number, since it uses less digits than its factorization.

99998523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3703658 (or 3703652 counting only the distinct ones).

The product of its digits is 1574640, while the sum is 54.

The square root of 99998523 is about 9999.9261497273. The cubic root of 99998523 is about 464.1565981411.

The spelling of 99998523 in words is "ninety-nine million, nine hundred ninety-eight thousand, five hundred twenty-three".