105720789 has 16 divisors (see below), whose sum is σ = 144607232. Its totient is φ = 68665968.

The previous prime is 105720787. The next prime is 105720793. The reversal of 105720789 is 987027501.

It is not a de Polignac number, because 105720789 - 2¹ = 105720787 is a prime.

It is a super-2 number, since 2×105720789² = 22353770453565042, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105720781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66684 + ... + 68250.

It is an arithmetic number, because the mean of its divisors is an integer number (9037952).

Almost surely, 2^105720789 is an apocalyptic number.

It is an amenable number.

105720789 is a deficient number, since it is larger than the sum of its proper divisors (38886443).

105720789 is a wasteful number, since it uses less digits than its factorization.

105720789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136.

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 105720789 is about 10282.0615150854. The cubic root of 105720789 is about 472.8464489726.

The spelling of 105720789 in words is "one hundred five million, seven hundred twenty thousand, seven hundred eighty-nine".