101309909 has 2 divisors, whose sum is σ = 101309910. Its totient is φ = 101309908.

The previous prime is 101309867. The next prime is 101309927. The reversal of 101309909 is 909903101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65966884 + 35343025 = 8122^2 + 5945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101309909 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101309939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50654954 + 50654955.

It is an arithmetic number, because the mean of its divisors is an integer number (50654955).

Almost surely, 2^101309909 is an apocalyptic number.

It is an amenable number.

101309909 is a deficient number, since it is larger than the sum of its proper divisors (1).

101309909 is an equidigital number, since it uses as much as digits as its factorization.

101309909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2187, while the sum is 32.

The square root of 101309909 is about 10065.2823606693. The cubic root of 101309909 is about 466.1767842829.

The spelling of 101309909 in words is "one hundred one million, three hundred nine thousand, nine hundred nine".