105805487 has 2 divisors, whose sum is σ = 105805488. Its totient is φ = 105805486.

The previous prime is 105805481. The next prime is 105805489. The reversal of 105805487 is 784508501.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 105805487 - 2⁶ = 105805423 is a prime.

It is a super-2 number, since 2×105805487² = 22389602158614338, which contains 22 as substring.

Together with 105805489, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 105805487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105805481) 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 as a sum of consecutive naturals, namely, 52902743 + 52902744.

It is an arithmetic number, because the mean of its divisors is an integer number (52902744).

Almost surely, 2^105805487 is an apocalyptic number.

105805487 is a deficient number, since it is larger than the sum of its proper divisors (1).

105805487 is an equidigital number, since it uses as much as digits as its factorization.

105805487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 44800, while the sum is 38.

The square root of 105805487 is about 10286.1794170625. The cubic root of 105805487 is about 472.9726885973.

The spelling of 105805487 in words is "one hundred five million, eight hundred five thousand, four hundred eighty-seven".