100889831 has 4 divisors (see below), whose sum is σ = 115302672. Its totient is φ = 86476992.

The previous prime is 100889827. The next prime is 100889857. The reversal of 100889831 is 138988001.

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

It is not a de Polignac number, because 100889831 - 2² = 100889827 is a prime.

It is a super-2 number, since 2×100889831² = 20357515998417122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100889801) 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, 7206410 + ... + 7206423.

It is an arithmetic number, because the mean of its divisors is an integer number (28825668).

Almost surely, 2^100889831 is an apocalyptic number.

100889831 is a deficient number, since it is larger than the sum of its proper divisors (14412841).

100889831 is an equidigital number, since it uses as much as digits as its factorization.

100889831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14412840.

The product of its (nonzero) digits is 13824, while the sum is 38.

The square root of 100889831 is about 10044.3930130198. The cubic root of 100889831 is about 465.5315630779.

The spelling of 100889831 in words is "one hundred million, eight hundred eighty-nine thousand, eight hundred thirty-one".