99549918 has 64 divisors (see below), whose sum is σ = 240609600. Its totient is φ = 30326400.

The previous prime is 99549907. The next prime is 99549929. The reversal of 99549918 is 81994599.

99549918 is a `hidden beast` number, since 9 + 9 + 549 + 91 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (99549907) and next prime (99549929).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75868 + ... + 77168.

It is an arithmetic number, because the mean of its divisors is an integer number (3759525).

Almost surely, 2^99549918 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99549918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120304800).

99549918 is an abundant number, since it is smaller than the sum of its proper divisors (141059682).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99549918 is a wasteful number, since it uses less digits than its factorization.

99549918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434 (or 1428 counting only the distinct ones).

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

The square root of 99549918 is about 9977.4705211291. The cubic root of 99549918 is about 463.4614708078.

The spelling of 99549918 in words is "ninety-nine million, five hundred forty-nine thousand, nine hundred eighteen".