853311391 has 2 divisors, whose sum is σ = 853311392. Its totient is φ = 853311390.

The previous prime is 853311377. The next prime is 853311421. The reversal of 853311391 is 193113358.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 853311391 - 2⁵ = 853311359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (853311091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426655695 + 426655696.

It is an arithmetic number, because the mean of its divisors is an integer number (426655696).

Almost surely, 2^853311391 is an apocalyptic number.

853311391 is a deficient number, since it is larger than the sum of its proper divisors (1).

853311391 is an equidigital number, since it uses as much as digits as its factorization.

853311391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 34.

The square root of 853311391 is about 29211.4941589779. The cubic root of 853311391 is about 948.4967512799.

The spelling of 853311391 in words is "eight hundred fifty-three million, three hundred eleven thousand, three hundred ninety-one".