99181347 has 4 divisors (see below), whose sum is σ = 132241800. Its totient is φ = 66120896.

The previous prime is 99181309. The next prime is 99181399. The reversal of 99181347 is 74318199.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99181347 - 2¹² = 99177251 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99181299 and 99181308.

It is not an unprimeable number, because it can be changed into a prime (99181447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16530222 + ... + 16530227.

It is an arithmetic number, because the mean of its divisors is an integer number (33060450).

Almost surely, 2^99181347 is an apocalyptic number.

99181347 is a deficient number, since it is larger than the sum of its proper divisors (33060453).

99181347 is a wasteful number, since it uses less digits than its factorization.

99181347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33060452.

The product of its digits is 54432, while the sum is 42.

The square root of 99181347 is about 9958.9832312340. The cubic root of 99181347 is about 462.8887942815. Note that the first 3 decimals are identical.

The spelling of 99181347 in words is "ninety-nine million, one hundred eighty-one thousand, three hundred forty-seven".