106391 has 2 divisors, whose sum is σ = 106392. Its totient is φ = 106390.

The previous prime is 106373. The next prime is 106397. The reversal of 106391 is 193601.

It is a strong prime.

It is an emirp because it is prime and its reverse (193601) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 106391 - 2¹⁰ = 105367 is a prime.

It is a super-2 number, since 2×106391² = 22638089762, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (106397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53195 + 53196.

It is an arithmetic number, because the mean of its divisors is an integer number (53196).

2¹⁰⁶³⁹¹ is an apocalyptic number.

106391 is a deficient number, since it is larger than the sum of its proper divisors (1).

106391 is an equidigital number, since it uses as much as digits as its factorization.

106391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 106391 is about 326.1763326791. The cubic root of 106391 is about 47.3843539428.

Adding to 106391 its reverse (193601), we get a palindrome (299992).

The spelling of 106391 in words is "one hundred six thousand, three hundred ninety-one".