99998529 has 16 divisors (see below), whose sum is σ = 138424320. Its totient is φ = 64144080.

The previous prime is 99998513. The next prime is 99998543. The reversal of 99998529 is 92589999.

It is not a de Polignac number, because 99998529 - 2⁴ = 99998513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99998429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13644 + ... + 19650.

It is an arithmetic number, because the mean of its divisors is an integer number (8651520).

Almost surely, 2^99998529 is an apocalyptic number.

It is an amenable number.

99998529 is a deficient number, since it is larger than the sum of its proper divisors (38425791).

99998529 is a wasteful number, since it uses less digits than its factorization.

99998529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6220.

The product of its digits is 4723920, while the sum is 60.

The square root of 99998529 is about 9999.9264497295. The cubic root of 99998529 is about 464.1566074244.

It can be divided in two parts, 9999 and 8529, that added together give a triangular number (18528 = T₁₉₂).

The spelling of 99998529 in words is "ninety-nine million, nine hundred ninety-eight thousand, five hundred twenty-nine".