105194389 has 4 divisors (see below), whose sum is σ = 105283180. Its totient is φ = 105105600.

The previous prime is 105194371. The next prime is 105194417. The reversal of 105194389 is 983491501.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8820900 + 96373489 = 2970^2 + 9817^2 .

It is a cyclic number.

It is not a de Polignac number, because 105194389 - 2⁵ = 105194357 is a prime.

It is a super-2 number, since 2×105194389² = 22131718954166642, 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 (105194329) 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, 42594 + ... + 44995.

It is an arithmetic number, because the mean of its divisors is an integer number (26320795).

Almost surely, 2^105194389 is an apocalyptic number.

It is an amenable number.

105194389 is a deficient number, since it is larger than the sum of its proper divisors (88791).

105194389 is an equidigital number, since it uses as much as digits as its factorization.

105194389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88790.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 105194389 is about 10256.4315919329. The cubic root of 105194389 is about 472.0603511957.

The spelling of 105194389 in words is "one hundred five million, one hundred ninety-four thousand, three hundred eighty-nine".