85816547 has 2 divisors, whose sum is σ = 85816548. Its totient is φ = 85816546.

The previous prime is 85816529. The next prime is 85816571. The reversal of 85816547 is 74561858.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85816547 - 2¹² = 85812451 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 85816498 and 85816507.

It is not a weakly prime, because it can be changed into another prime (85816517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42908273 + 42908274.

It is an arithmetic number, because the mean of its divisors is an integer number (42908274).

Almost surely, 2^85816547 is an apocalyptic number.

85816547 is a deficient number, since it is larger than the sum of its proper divisors (1).

85816547 is an equidigital number, since it uses as much as digits as its factorization.

85816547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 268800, while the sum is 44.

The square root of 85816547 is about 9263.7220921183. The cubic root of 85816547 is about 441.0864113900.

The spelling of 85816547 in words is "eighty-five million, eight hundred sixteen thousand, five hundred forty-seven".