99994181 has 8 divisors (see below), whose sum is σ = 114784320. Its totient is φ = 85330368.

The previous prime is 99994177. The next prime is 99994183. The reversal of 99994181 is 18149999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99994181 - 2² = 99994177 is a prime.

It is a super-2 number, since 2×99994181² = 19997672467721522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99994183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29876 + ... + 33053.

It is an arithmetic number, because the mean of its divisors is an integer number (14348040).

Almost surely, 2^99994181 is an apocalyptic number.

It is an amenable number.

99994181 is a deficient number, since it is larger than the sum of its proper divisors (14790139).

99994181 is a wasteful number, since it uses less digits than its factorization.

99994181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63163.

The product of its digits is 209952, while the sum is 50.

The square root of 99994181 is about 9999.7090457673. The cubic root of 99994181 is about 464.1498800515.

The spelling of 99994181 in words is "ninety-nine million, nine hundred ninety-four thousand, one hundred eighty-one".