841391 has 2 divisors, whose sum is σ = 841392. Its totient is φ = 841390.

The previous prime is 841369. The next prime is 841397. The reversal of 841391 is 193148.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 841391 - 2⁶ = 841327 is a prime.

It is a Chen prime.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 841391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (841397) 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, 420695 + 420696.

It is an arithmetic number, because the mean of its divisors is an integer number (420696).

2⁸⁴¹³⁹¹ is an apocalyptic number.

841391 is a deficient number, since it is larger than the sum of its proper divisors (1).

841391 is an equidigital number, since it uses as much as digits as its factorization.

841391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 26.

The square root of 841391 is about 917.2736778083. The cubic root of 841391 is about 94.4059327283.

The spelling of 841391 in words is "eight hundred forty-one thousand, three hundred ninety-one".