1099859 has 2 divisors, whose sum is σ = 1099860. Its totient is φ = 1099858.

The previous prime is 1099843. The next prime is 1099867. The reversal of 1099859 is 9589901.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1099859 - 2⁴ = 1099843 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1099459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549929 + 549930.

It is an arithmetic number, because the mean of its divisors is an integer number (549930).

2^1099859 is an apocalyptic number.

1099859 is a deficient number, since it is larger than the sum of its proper divisors (1).

1099859 is an equidigital number, since it uses as much as digits as its factorization.

1099859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 41.

The square root of 1099859 is about 1048.7416269034. The cubic root of 1099859 is about 103.2236007058.

The spelling of 1099859 in words is "one million, ninety-nine thousand, eight hundred fifty-nine".