849391 has 2 divisors, whose sum is σ = 849392. Its totient is φ = 849390.

The previous prime is 849383. The next prime is 849419. The reversal of 849391 is 193948.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 849391 - 2³ = 849383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (849301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 424695 + 424696.

It is an arithmetic number, because the mean of its divisors is an integer number (424696).

2⁸⁴⁹³⁹¹ is an apocalyptic number.

849391 is a deficient number, since it is larger than the sum of its proper divisors (1).

849391 is an equidigital number, since it uses as much as digits as its factorization.

849391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 34.

The square root of 849391 is about 921.6241099277. The cubic root of 849391 is about 94.7041953192.

The spelling of 849391 in words is "eight hundred forty-nine thousand, three hundred ninety-one".