99812005 has 8 divisors (see below), whose sum is σ = 119848824. Its totient is φ = 79800000.

The previous prime is 99811979. The next prime is 99812023. The reversal of 99812005 is 50021899.

It can be written as a sum of positive squares in 4 ways, for example, as 91809 + 99720196 = 303^2 + 9986^2 .

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

It is not a de Polignac number, because 99812005 - 2¹³ = 99803813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 4255 + ... + 14755.

It is an arithmetic number, because the mean of its divisors is an integer number (14981103).

Almost surely, 2^99812005 is an apocalyptic number.

It is an amenable number.

99812005 is a deficient number, since it is larger than the sum of its proper divisors (20036819).

99812005 is a wasteful number, since it uses less digits than its factorization.

99812005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12407.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 99812005 is about 9990.5958280775. The cubic root of 99812005 is about 463.8678357358.

The spelling of 99812005 in words is "ninety-nine million, eight hundred twelve thousand, five".