85668481 has 2 divisors, whose sum is σ = 85668482. Its totient is φ = 85668480.

The previous prime is 85668439. The next prime is 85668487. The reversal of 85668481 is 18486658.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85655025 + 13456 = 9255^2 + 116^2 .

It is a cyclic number.

It is not a de Polignac number, because 85668481 - 2⁹ = 85667969 is a prime.

It is a super-2 number, since 2×85668481² = 14678177273694722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85668487) 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, 42834240 + 42834241.

It is an arithmetic number, because the mean of its divisors is an integer number (42834241).

Almost surely, 2^85668481 is an apocalyptic number.

It is an amenable number.

85668481 is a deficient number, since it is larger than the sum of its proper divisors (1).

85668481 is an equidigital number, since it uses as much as digits as its factorization.

85668481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 368640, while the sum is 46.

The square root of 85668481 is about 9255.7269298527. The cubic root of 85668481 is about 440.8325850579.

The spelling of 85668481 in words is "eighty-five million, six hundred sixty-eight thousand, four hundred eighty-one".