105720117 has 4 divisors (see below), whose sum is σ = 140960160. Its totient is φ = 70480076.

The previous prime is 105720113. The next prime is 105720149. The reversal of 105720117 is 711027501.

It is a happy number.

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 105720117 - 2² = 105720113 is a prime.

It is a super-2 number, since 2×105720117² = 22353486276987378, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105720113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17620017 + ... + 17620022.

It is an arithmetic number, because the mean of its divisors is an integer number (35240040).

Almost surely, 2^105720117 is an apocalyptic number.

It is an amenable number.

105720117 is a deficient number, since it is larger than the sum of its proper divisors (35240043).

105720117 is an equidigital number, since it uses as much as digits as its factorization.

105720117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35240042.

The product of its (nonzero) digits is 490, while the sum is 24.

The square root of 105720117 is about 10282.0288367617. The cubic root of 105720117 is about 472.8454471088.

Adding to 105720117 its reverse (711027501), we get a palindrome (816747618).

The spelling of 105720117 in words is "one hundred five million, seven hundred twenty thousand, one hundred seventeen".