85147847 has 2 divisors, whose sum is σ = 85147848. Its totient is φ = 85147846.

The previous prime is 85147823. The next prime is 85147871. The reversal of 85147847 is 74874158.

It is a balanced prime because it is at equal distance from previous prime (85147823) and next prime (85147871).

It is a cyclic number.

It is not a de Polignac number, because 85147847 - 2¹⁰ = 85146823 is a prime.

It is a Chen prime.

It is equal to p_4951799 and since 85147847 and 4951799 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 85147798 and 85147807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85147147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42573923 + 42573924.

It is an arithmetic number, because the mean of its divisors is an integer number (42573924).

Almost surely, 2^85147847 is an apocalyptic number.

85147847 is a deficient number, since it is larger than the sum of its proper divisors (1).

85147847 is an equidigital number, since it uses as much as digits as its factorization.

85147847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 250880, while the sum is 44.

The square root of 85147847 is about 9227.5591030348. The cubic root of 85147847 is about 439.9377442910.

It can be divided in two parts, 8514 and 7847, that added together give a palindrome (16361).

The spelling of 85147847 in words is "eighty-five million, one hundred forty-seven thousand, eight hundred forty-seven".