105018389 has 4 divisors (see below), whose sum is σ = 120021024. Its totient is φ = 90015756.

The previous prime is 105018383. The next prime is 105018449. The reversal of 105018389 is 983810501.

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 105018389 - 2⁴ = 105018373 is a prime.

It is a super-3 number, since 3×105018389³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105018383) 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 3 ways as a sum of consecutive naturals, for example, 7501307 + ... + 7501320.

It is an arithmetic number, because the mean of its divisors is an integer number (30005256).

Almost surely, 2^105018389 is an apocalyptic number.

It is an amenable number.

105018389 is a deficient number, since it is larger than the sum of its proper divisors (15002635).

105018389 is an equidigital number, since it uses as much as digits as its factorization.

105018389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15002634.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 105018389 is about 10247.8480179987. The cubic root of 105018389 is about 471.7969372731.

The spelling of 105018389 in words is "one hundred five million, eighteen thousand, three hundred eighty-nine".