105998687 has 2 divisors, whose sum is σ = 105998688. Its totient is φ = 105998686.

The previous prime is 105998647. The next prime is 105998773. The reversal of 105998687 is 786899501.

It is a weak prime.

It is an emirp because it is prime and its reverse (786899501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 105998687 - 2¹⁰ = 105997663 is a prime.

It is a super-2 number, since 2×105998687² = 22471443291447938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105998617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52999343 + 52999344.

It is an arithmetic number, because the mean of its divisors is an integer number (52999344).

Almost surely, 2^105998687 is an apocalyptic number.

105998687 is a deficient number, since it is larger than the sum of its proper divisors (1).

105998687 is an equidigital number, since it uses as much as digits as its factorization.

105998687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1088640, while the sum is 53.

The square root of 105998687 is about 10295.5663758727. The cubic root of 105998687 is about 473.2603950408.

The spelling of 105998687 in words is "one hundred five million, nine hundred ninety-eight thousand, six hundred eighty-seven".