101340391 has 2 divisors, whose sum is σ = 101340392. Its totient is φ = 101340390.

The previous prime is 101340389. The next prime is 101340403. The reversal of 101340391 is 193043101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101340391 - 2¹ = 101340389 is a prime.

Together with 101340389, 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 (101340301) 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, 50670195 + 50670196.

It is an arithmetic number, because the mean of its divisors is an integer number (50670196).

Almost surely, 2^101340391 is an apocalyptic number.

101340391 is a deficient number, since it is larger than the sum of its proper divisors (1).

101340391 is an equidigital number, since it uses as much as digits as its factorization.

101340391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 101340391 is about 10066.7964616356. The cubic root of 101340391 is about 466.2235338258.

Adding to 101340391 its reverse (193043101), we get a palindrome (294383492).

The spelling of 101340391 in words is "one hundred one million, three hundred forty thousand, three hundred ninety-one".