85071563 has 2 divisors, whose sum is σ = 85071564. Its totient is φ = 85071562.

The previous prime is 85071559. The next prime is 85071583. The reversal of 85071563 is 36517058.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85071563 - 2² = 85071559 is a prime.

It is a Chen prime.

It is equal to p_4947605 and since 85071563 and 4947605 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (85071523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42535781 + 42535782.

It is an arithmetic number, because the mean of its divisors is an integer number (42535782).

Almost surely, 2^85071563 is an apocalyptic number.

85071563 is a deficient number, since it is larger than the sum of its proper divisors (1).

85071563 is an equidigital number, since it uses as much as digits as its factorization.

85071563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 85071563 is about 9223.4246893440. The cubic root of 85071563 is about 439.8063248864.

The spelling of 85071563 in words is "eighty-five million, seventy-one thousand, five hundred sixty-three".