859447 has 2 divisors, whose sum is σ = 859448. Its totient is φ = 859446.

The previous prime is 859433. The next prime is 859459. The reversal of 859447 is 744958.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-859447 is a prime.

It is a Chen prime.

859447 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (859477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429723 + 429724.

It is an arithmetic number, because the mean of its divisors is an integer number (429724).

2⁸⁵⁹⁴⁴⁷ is an apocalyptic number.

859447 is a deficient number, since it is larger than the sum of its proper divisors (1).

859447 is an equidigital number, since it uses as much as digits as its factorization.

859447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 37.

The square root of 859447 is about 927.0636439857. The cubic root of 859447 is about 95.0764665972.

The spelling of 859447 in words is "eight hundred fifty-nine thousand, four hundred forty-seven".