105812919907 has 4 divisors (see below), whose sum is σ = 109226239936. Its totient is φ = 102399599880.

The previous prime is 105812919881. The next prime is 105812919917. The reversal of 105812919907 is 709919218501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 709919218501 = 193859 ⋅3662039.

It is a cyclic number.

It is not a de Polignac number, because 105812919907 - 2²⁷ = 105678702179 is a prime.

It is a super-2 number, since 2×105812919907² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105812919917) 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, 1706659968 + ... + 1706660029.

It is an arithmetic number, because the mean of its divisors is an integer number (27306559984).

Almost surely, 2^105812919907 is an apocalyptic number.

105812919907 is a deficient number, since it is larger than the sum of its proper divisors (3413320029).

105812919907 is an equidigital number, since it uses as much as digits as its factorization.

105812919907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3413320028.

The product of its (nonzero) digits is 408240, while the sum is 52.

The spelling of 105812919907 in words is "one hundred five billion, eight hundred twelve million, nine hundred nineteen thousand, nine hundred seven".