100809539 has 8 divisors (see below), whose sum is σ = 104412000. Its totient is φ = 97215552.

The previous prime is 100809521. The next prime is 100809557. The reversal of 100809539 is 935908001.

It is an interprime number because it is at equal distance from previous prime (100809521) and next prime (100809557).

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 100809539 - 2¹² = 100805443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100809499 and 100809508.

It is not an unprimeable number, because it can be changed into a prime (100809509) 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 7 ways as a sum of consecutive naturals, for example, 31202 + ... + 34280.

It is an arithmetic number, because the mean of its divisors is an integer number (13051500).

Almost surely, 2^100809539 is an apocalyptic number.

100809539 is a deficient number, since it is larger than the sum of its proper divisors (3602461).

100809539 is a wasteful number, since it uses less digits than its factorization.

100809539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4237.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 100809539 is about 10040.3953607415. The cubic root of 100809539 is about 465.4080343403.

The spelling of 100809539 in words is "one hundred million, eight hundred nine thousand, five hundred thirty-nine".