101103809 has 2 divisors, whose sum is σ = 101103810. Its totient is φ = 101103808.

The previous prime is 101103797. The next prime is 101103829. The reversal of 101103809 is 908301101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101103025 + 784 = 10055^2 + 28^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101103809 is a prime.

It is not a weakly prime, because it can be changed into another prime (101103829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50551904 + 50551905.

It is an arithmetic number, because the mean of its divisors is an integer number (50551905).

Almost surely, 2^101103809 is an apocalyptic number.

It is an amenable number.

101103809 is a deficient number, since it is larger than the sum of its proper divisors (1).

101103809 is an equidigital number, since it uses as much as digits as its factorization.

101103809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 101103809 is about 10055.0389855037. The cubic root of 101103809 is about 465.8604471389.

The spelling of 101103809 in words is "one hundred one million, one hundred three thousand, eight hundred nine".