85841663 has 2 divisors, whose sum is σ = 85841664. Its totient is φ = 85841662.

The previous prime is 85841647. The next prime is 85841699. The reversal of 85841663 is 36614858.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85841663 - 2⁴ = 85841647 is a prime.

It is a super-2 number, since 2×85841663² = 14737582213211138, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 85841663.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85841863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42920831 + 42920832.

It is an arithmetic number, because the mean of its divisors is an integer number (42920832).

Almost surely, 2^85841663 is an apocalyptic number.

85841663 is a deficient number, since it is larger than the sum of its proper divisors (1).

85841663 is an equidigital number, since it uses as much as digits as its factorization.

85841663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 41.

The square root of 85841663 is about 9265.0776035606. The cubic root of 85841663 is about 441.1294382347.

The spelling of 85841663 in words is "eighty-five million, eight hundred forty-one thousand, six hundred sixty-three".