105605039 has 4 divisors (see below), whose sum is σ = 105646440. Its totient is φ = 105563640.

The previous prime is 105605023. The next prime is 105605051. The reversal of 105605039 is 930506501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 930506501 = 157 ⋅5926793.

It is a cyclic number.

It is not a de Polignac number, because 105605039 - 2⁴ = 105605023 is a prime.

It is a super-2 number, since 2×105605039² = 22304848524383042, 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 (105605009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16604 + ... + 22065.

It is an arithmetic number, because the mean of its divisors is an integer number (26411610).

Almost surely, 2^105605039 is an apocalyptic number.

105605039 is a deficient number, since it is larger than the sum of its proper divisors (41401).

105605039 is an equidigital number, since it uses as much as digits as its factorization.

105605039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41400.

The product of its (nonzero) digits is 4050, while the sum is 29.

The square root of 105605039 is about 10276.4312385186. The cubic root of 105605039 is about 472.6738182666.

The spelling of 105605039 in words is "one hundred five million, six hundred five thousand, thirty-nine".