105899999 has 12 divisors (see below), whose sum is σ = 111117888. Its totient is φ = 100821600.

The previous prime is 105899971. The next prime is 105900001. The reversal of 105899999 is 999998501.

It is not a de Polignac number, because 105899999 - 2⁸ = 105899743 is a prime.

It is a super-2 number, since 2×105899999² = 22429619576400002, which contains 22 as substring.

105899999 is a modest number, since divided by 99999 gives 1058 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105899099) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138779 + ... + 139539.

It is an arithmetic number, because the mean of its divisors is an integer number (9259824).

Almost surely, 2^105899999 is an apocalyptic number.

105899999 is a deficient number, since it is larger than the sum of its proper divisors (5217889).

105899999 is an frugal number, since it uses more digits than its factorization.

105899999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926 (or 859 counting only the distinct ones).

The product of its (nonzero) digits is 2361960, while the sum is 59.

The square root of 105899999 is about 10290.7725171631. The cubic root of 105899999 is about 473.1134761643.

The spelling of 105899999 in words is "one hundred five million, eight hundred ninety-nine thousand, nine hundred ninety-nine".