100858891 has 8 divisors (see below), whose sum is σ = 115431680. Its totient is φ = 86327208.

The previous prime is 100858873. The next prime is 100858913. The reversal of 100858891 is 198858001.

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 100858891 - 2⁷ = 100858763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100858831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4821 + ... + 14998.

It is an arithmetic number, because the mean of its divisors is an integer number (14428960).

Almost surely, 2^100858891 is an apocalyptic number.

100858891 is a deficient number, since it is larger than the sum of its proper divisors (14572789).

100858891 is an equidigital number, since it uses as much as digits as its factorization.

100858891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20553.

The product of its (nonzero) digits is 23040, while the sum is 40.

The square root of 100858891 is about 10042.8527321673. The cubic root of 100858891 is about 465.4839698466.

The spelling of 100858891 in words is "one hundred million, eight hundred fifty-eight thousand, eight hundred ninety-one".