85564147 has 2 divisors, whose sum is σ = 85564148. Its totient is φ = 85564146.

The previous prime is 85564139. The next prime is 85564153. The reversal of 85564147 is 74146558.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85564147 - 2³ = 85564139 is a prime.

It is not a weakly prime, because it can be changed into another prime (85564187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42782073 + 42782074.

It is an arithmetic number, because the mean of its divisors is an integer number (42782074).

Almost surely, 2^85564147 is an apocalyptic number.

85564147 is a deficient number, since it is larger than the sum of its proper divisors (1).

85564147 is an equidigital number, since it uses as much as digits as its factorization.

85564147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 134400, while the sum is 40.

The square root of 85564147 is about 9250.0890265986. The cubic root of 85564147 is about 440.6535518410.

The spelling of 85564147 in words is "eighty-five million, five hundred sixty-four thousand, one hundred forty-seven".