105813889 has 4 divisors (see below), whose sum is σ = 106575280. Its totient is φ = 105052500.

The previous prime is 105813887. The next prime is 105813901. The reversal of 105813889 is 988318501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 105813889 - 2¹ = 105813887 is a prime.

It is a super-2 number, since 2×105813889² = 22393158210608642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105813887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380487 + ... + 380764.

It is an arithmetic number, because the mean of its divisors is an integer number (26643820).

Almost surely, 2^105813889 is an apocalyptic number.

It is an amenable number.

105813889 is a deficient number, since it is larger than the sum of its proper divisors (761391).

105813889 is an equidigital number, since it uses as much as digits as its factorization.

105813889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761390.

The product of its (nonzero) digits is 69120, while the sum is 43.

The square root of 105813889 is about 10286.5878210415. The cubic root of 105813889 is about 472.9852078326.

The spelling of 105813889 in words is "one hundred five million, eight hundred thirteen thousand, eight hundred eighty-nine".