1001109859 has 2 divisors, whose sum is σ = 1001109860. Its totient is φ = 1001109858.

The previous prime is 1001109803. The next prime is 1001109871. The reversal of 1001109859 is 9589011001.

It is a strong prime.

It is an emirp because it is prime and its reverse (9589011001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001109859 is a prime.

It is not a weakly prime, because it can be changed into another prime (1001149859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500554929 + 500554930.

It is an arithmetic number, because the mean of its divisors is an integer number (500554930).

Almost surely, 2^1001109859 is an apocalyptic number.

1001109859 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001109859 is an equidigital number, since it uses as much as digits as its factorization.

1001109859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 34.

The square root of 1001109859 is about 31640.3201469265. The cubic root of 1001109859 is about 1000.3698162191.

The spelling of 1001109859 in words is "one billion, one million, one hundred nine thousand, eight hundred fifty-nine".