85822859 has 2 divisors, whose sum is σ = 85822860. Its totient is φ = 85822858.

The previous prime is 85822823. The next prime is 85822871. The reversal of 85822859 is 95822858.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85822859 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85822879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42911429 + 42911430.

It is an arithmetic number, because the mean of its divisors is an integer number (42911430).

Almost surely, 2^85822859 is an apocalyptic number.

85822859 is a deficient number, since it is larger than the sum of its proper divisors (1).

85822859 is an equidigital number, since it uses as much as digits as its factorization.

85822859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 460800, while the sum is 47.

The square root of 85822859 is about 9264.0627696492. The cubic root of 85822859 is about 441.0972254240.

Subtracting 85822859 from its reverse (95822858), we obtain a palindrome (9999999).

The spelling of 85822859 in words is "eighty-five million, eight hundred twenty-two thousand, eight hundred fifty-nine".