101243309 has 16 divisors (see below), whose sum is σ = 109396224. Its totient is φ = 93456000.

The previous prime is 101243299. The next prime is 101243333. The reversal of 101243309 is 903342101.

101243309 is nontrivially palindromic in base 14.

It is a cyclic number.

It is not a de Polignac number, because 101243309 - 2¹² = 101239213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101243339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94712 + ... + 95774.

It is an arithmetic number, because the mean of its divisors is an integer number (6837264).

Almost surely, 2^101243309 is an apocalyptic number.

It is an amenable number.

101243309 is a deficient number, since it is larger than the sum of its proper divisors (8152915).

101243309 is a wasteful number, since it uses less digits than its factorization.

101243309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 101243309 is about 10061.9734147929. The cubic root of 101243309 is about 466.0746087569.

The spelling of 101243309 in words is "one hundred one million, two hundred forty-three thousand, three hundred nine".