105909887 has 2 divisors, whose sum is σ = 105909888. Its totient is φ = 105909886.

The previous prime is 105909877. The next prime is 105909889. The reversal of 105909887 is 788909501.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (788909501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 105909887 - 2²² = 101715583 is a prime.

It is a super-2 number, since 2×105909887² = 22433808328705538, which contains 22 as substring.

Together with 105909889, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105909889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52954943 + 52954944.

It is an arithmetic number, because the mean of its divisors is an integer number (52954944).

Almost surely, 2^105909887 is an apocalyptic number.

105909887 is a deficient number, since it is larger than the sum of its proper divisors (1).

105909887 is an equidigital number, since it uses as much as digits as its factorization.

105909887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 47.

The square root of 105909887 is about 10291.2529363533. The cubic root of 105909887 is about 473.1282007488.

The spelling of 105909887 in words is "one hundred five million, nine hundred nine thousand, eight hundred eighty-seven".