105789421 has 4 divisors (see below), whose sum is σ = 105968412. Its totient is φ = 105610432.

The previous prime is 105789413. The next prime is 105789427. The reversal of 105789421 is 124987501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124987501 = 829 ⋅150769.

It can be written as a sum of positive squares in 2 ways, for example, as 88566921 + 17222500 = 9411^2 + 4150^2 .

It is a cyclic number.

It is not a de Polignac number, because 105789421 - 2³ = 105789413 is a prime.

It is a super-2 number, since 2×105789421² = 22382803191030482, 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 (105789427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88606 + ... + 89791.

It is an arithmetic number, because the mean of its divisors is an integer number (26492103).

Almost surely, 2^105789421 is an apocalyptic number.

It is an amenable number.

105789421 is a deficient number, since it is larger than the sum of its proper divisors (178991).

105789421 is an equidigital number, since it uses as much as digits as its factorization.

105789421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178990.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 105789421 is about 10285.3984366188. The cubic root of 105789421 is about 472.9487479238.

The spelling of 105789421 in words is "one hundred five million, seven hundred eighty-nine thousand, four hundred twenty-one".