85147823 has 2 divisors, whose sum is σ = 85147824. Its totient is φ = 85147822.

The previous prime is 85147801. The next prime is 85147847. The reversal of 85147823 is 32874158.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85147823 - 2¹⁴ = 85131439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85147423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42573911 + 42573912.

It is an arithmetic number, because the mean of its divisors is an integer number (42573912).

Almost surely, 2^85147823 is an apocalyptic number.

85147823 is a deficient number, since it is larger than the sum of its proper divisors (1).

85147823 is an equidigital number, since it uses as much as digits as its factorization.

85147823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 38.

The square root of 85147823 is about 9227.5578025824. The cubic root of 85147823 is about 439.9377029570.

The spelling of 85147823 in words is "eighty-five million, one hundred forty-seven thousand, eight hundred twenty-three".