105081919 has 4 divisors (see below), whose sum is σ = 105359560. Its totient is φ = 104804280.

The previous prime is 105081883. The next prime is 105081941. The reversal of 105081919 is 919180501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 105081919 - 2⁷ = 105081791 is a prime.

It is a super-2 number, since 2×105081919² = 22084419401445122, 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 (105081979) 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, 138252 + ... + 139009.

It is an arithmetic number, because the mean of its divisors is an integer number (26339890).

Almost surely, 2^105081919 is an apocalyptic number.

105081919 is a deficient number, since it is larger than the sum of its proper divisors (277641).

105081919 is an equidigital number, since it uses as much as digits as its factorization.

105081919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277640.

The product of its (nonzero) digits is 3240, while the sum is 34.

The square root of 105081919 is about 10250.9472245252. The cubic root of 105081919 is about 471.8920546385.

The spelling of 105081919 in words is "one hundred five million, eighty-one thousand, nine hundred nineteen".