99998145 has 72 divisors (see below), whose sum is σ = 195039936. Its totient is φ = 49128768.

The previous prime is 99998111. The next prime is 99998147. The reversal of 99998145 is 54189999.

It is not a de Polignac number, because 99998145 - 2¹¹ = 99996097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99998091 and 99998100.

It is not an unprimeable number, because it can be changed into a prime (99998147) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 205092 + ... + 205578.

It is an arithmetic number, because the mean of its divisors is an integer number (2708888).

Almost surely, 2^99998145 is an apocalyptic number.

It is an amenable number.

99998145 is a deficient number, since it is larger than the sum of its proper divisors (95041791).

99998145 is a wasteful number, since it uses less digits than its factorization.

99998145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533 (or 508 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 54.

The square root of 99998145 is about 9999.9072495699. The cubic root of 99998145 is about 464.1560132944.

The spelling of 99998145 in words is "ninety-nine million, nine hundred ninety-eight thousand, one hundred forty-five".