99981170 has 8 divisors (see below), whose sum is σ = 179966124. Its totient is φ = 39992464.

The previous prime is 99981163. The next prime is 99981179. The reversal of 99981170 is 7118999.

It can be written as a sum of positive squares in 2 ways, for example, as 98942809 + 1038361 = 9947^2 + 1019^2 .

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

It is not an unprimeable number, because it can be changed into a prime (99981179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4999049 + ... + 4999068.

Almost surely, 2^99981170 is an apocalyptic number.

99981170 is a deficient number, since it is larger than the sum of its proper divisors (79984954).

99981170 is a wasteful number, since it uses less digits than its factorization.

99981170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9998124.

The product of its (nonzero) digits is 40824, while the sum is 44.

The square root of 99981170 is about 9999.0584556747. The cubic root of 99981170 is about 464.1297478265.

The spelling of 99981170 in words is "ninety-nine million, nine hundred eighty-one thousand, one hundred seventy".