853543 has 2 divisors, whose sum is σ = 853544. Its totient is φ = 853542.

The previous prime is 853529. The next prime is 853547. The reversal of 853543 is 345358.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 853543 - 2⁹ = 853031 is a prime.

It is equal to p₆₇₈₇₀ and since 853543 and 67870 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (853547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426771 + 426772.

It is an arithmetic number, because the mean of its divisors is an integer number (426772).

2⁸⁵³⁵⁴³ is an apocalyptic number.

853543 is a deficient number, since it is larger than the sum of its proper divisors (1).

853543 is an equidigital number, since it uses as much as digits as its factorization.

853543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 28.

The square root of 853543 is about 923.8739091456. The cubic root of 853543 is about 94.8582558374.

The spelling of 853543 in words is "eight hundred fifty-three thousand, five hundred forty-three".