105709789 has 4 divisors (see below), whose sum is σ = 105730780. Its totient is φ = 105688800.

The previous prime is 105709759. The next prime is 105709811. The reversal of 105709789 is 987907501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 987907501 = 7 ⋅141129643.

It can be written as a sum of positive squares in 2 ways, for example, as 66145689 + 39564100 = 8133^2 + 6290^2 .

It is a cyclic number.

It is not a de Polignac number, because 105709789 - 2⁹ = 105709277 is a prime.

It is a super-2 number, since 2×105709789² = 22349118980849042, 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 (105709729) 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, 2089 + ... + 14689.

It is an arithmetic number, because the mean of its divisors is an integer number (26432695).

Almost surely, 2^105709789 is an apocalyptic number.

It is an amenable number.

105709789 is a deficient number, since it is larger than the sum of its proper divisors (20991).

105709789 is an equidigital number, since it uses as much as digits as its factorization.

105709789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20990.

The product of its (nonzero) digits is 158760, while the sum is 46.

The square root of 105709789 is about 10281.5265889847. The cubic root of 105709789 is about 472.8300488826.

The spelling of 105709789 in words is "one hundred five million, seven hundred nine thousand, seven hundred eighty-nine".