85843399 has 2 divisors, whose sum is σ = 85843400. Its totient is φ = 85843398.

The previous prime is 85843379. The next prime is 85843403. The reversal of 85843399 is 99334858.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85843399 - 2¹¹ = 85841351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85843369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42921699 + 42921700.

It is an arithmetic number, because the mean of its divisors is an integer number (42921700).

Almost surely, 2^85843399 is an apocalyptic number.

85843399 is a deficient number, since it is larger than the sum of its proper divisors (1).

85843399 is an equidigital number, since it uses as much as digits as its factorization.

85843399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 49.

The square root of 85843399 is about 9265.1712882170. The cubic root of 85843399 is about 441.1324119094.

The spelling of 85843399 in words is "eighty-five million, eight hundred forty-three thousand, three hundred ninety-nine".