100856859 has 4 divisors (see below), whose sum is σ = 134475816. Its totient is φ = 67237904.

The previous prime is 100856839. The next prime is 100856881. The reversal of 100856859 is 958658001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100856859 - 2⁸ = 100856603 is a prime.

It is a super-3 number, since 3×100856859³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 100856859.

It is not an unprimeable number, because it can be changed into a prime (100856839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16809474 + ... + 16809479.

It is an arithmetic number, because the mean of its divisors is an integer number (33618954).

Almost surely, 2^100856859 is an apocalyptic number.

100856859 is a deficient number, since it is larger than the sum of its proper divisors (33618957).

100856859 is an equidigital number, since it uses as much as digits as its factorization.

100856859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33618956.

The product of its (nonzero) digits is 86400, while the sum is 42.

The square root of 100856859 is about 10042.7515651837. The cubic root of 100856859 is about 465.4808437967.

The spelling of 100856859 in words is "one hundred million, eight hundred fifty-six thousand, eight hundred fifty-nine".