99812681 has 8 divisors (see below), whose sum is σ = 106506720. Its totient is φ = 93262752.

The previous prime is 99812677. The next prime is 99812683. The reversal of 99812681 is 18621899.

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 99812681 - 2² = 99812677 is a prime.

It is a super-2 number, since 2×99812681² = 19925142576815522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99812683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34595 + ... + 37368.

It is an arithmetic number, because the mean of its divisors is an integer number (13313340).

Almost surely, 2^99812681 is an apocalyptic number.

It is an amenable number.

99812681 is a deficient number, since it is larger than the sum of its proper divisors (6694039).

99812681 is a wasteful number, since it uses less digits than its factorization.

99812681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72055.

The product of its digits is 62208, while the sum is 44.

The square root of 99812681 is about 9990.6296598363. The cubic root of 99812681 is about 463.8688829510.

The spelling of 99812681 in words is "ninety-nine million, eight hundred twelve thousand, six hundred eighty-one".