101243239 has 2 divisors, whose sum is σ = 101243240. Its totient is φ = 101243238.

The previous prime is 101243237. The next prime is 101243299. The reversal of 101243239 is 932342101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101243239 - 2¹ = 101243237 is a prime.

It is a super-2 number, since 2×101243239² = 20500386886422242, which contains 22 as substring.

Together with 101243237, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101243237) 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 as a sum of consecutive naturals, namely, 50621619 + 50621620.

It is an arithmetic number, because the mean of its divisors is an integer number (50621620).

Almost surely, 2^101243239 is an apocalyptic number.

101243239 is a deficient number, since it is larger than the sum of its proper divisors (1).

101243239 is an equidigital number, since it uses as much as digits as its factorization.

101243239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 101243239 is about 10061.9699363494. The cubic root of 101243239 is about 466.0745013417.

The spelling of 101243239 in words is "one hundred one million, two hundred forty-three thousand, two hundred thirty-nine".