100851009 has 16 divisors (see below), whose sum is σ = 158977920. Its totient is φ = 55641600.

The previous prime is 100851007. The next prime is 100851017. The reversal of 100851009 is 900158001.

It is not a de Polignac number, because 100851009 - 2¹ = 100851007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100851009.

It is not an unprimeable number, because it can be changed into a prime (100851007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82192 + ... + 83409.

It is an arithmetic number, because the mean of its divisors is an integer number (9936120).

Almost surely, 2^100851009 is an apocalyptic number.

It is an amenable number.

100851009 is a deficient number, since it is larger than the sum of its proper divisors (58126911).

100851009 is a wasteful number, since it uses less digits than its factorization.

100851009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165640.

The product of its (nonzero) digits is 360, while the sum is 24.

The square root of 100851009 is about 10042.4603061202. The cubic root of 100851009 is about 465.4718438615.

The spelling of 100851009 in words is "one hundred million, eight hundred fifty-one thousand, nine".