859391453 has 2 divisors, whose sum is σ = 859391454. Its totient is φ = 859391452.

The previous prime is 859391443. The next prime is 859391473. The reversal of 859391453 is 354193958.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 464057764 + 395333689 = 21542^2 + 19883^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-859391453 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 859391398 and 859391407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (859391443) 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, 429695726 + 429695727.

It is an arithmetic number, because the mean of its divisors is an integer number (429695727).

Almost surely, 2^859391453 is an apocalyptic number.

It is an amenable number.

859391453 is a deficient number, since it is larger than the sum of its proper divisors (1).

859391453 is an equidigital number, since it uses as much as digits as its factorization.

859391453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 583200, while the sum is 47.

The square root of 859391453 is about 29315.3791208642. The cubic root of 859391453 is about 950.7441825433.

The spelling of 859391453 in words is "eight hundred fifty-nine million, three hundred ninety-one thousand, four hundred fifty-three".