105939919 has 4 divisors (see below), whose sum is σ = 106181680. Its totient is φ = 105698160.

The previous prime is 105939913. The next prime is 105939947. The reversal of 105939919 is 919939501.

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 105939919 - 2⁵ = 105939887 is a prime.

It is a super-2 number, since 2×105939919² = 22446532875453122, 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 (105939913) 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, 120222 + ... + 121099.

It is an arithmetic number, because the mean of its divisors is an integer number (26545420).

Almost surely, 2^105939919 is an apocalyptic number.

105939919 is the 5943-rd hex number.

105939919 is a deficient number, since it is larger than the sum of its proper divisors (241761).

105939919 is an equidigital number, since it uses as much as digits as its factorization.

105939919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241760.

The product of its (nonzero) digits is 98415, while the sum is 46.

The square root of 105939919 is about 10292.7119361226. The cubic root of 105939919 is about 473.1729168866.

The spelling of 105939919 in words is "one hundred five million, nine hundred thirty-nine thousand, nine hundred nineteen".