85858681 has 2 divisors, whose sum is σ = 85858682. Its totient is φ = 85858680.

The previous prime is 85858673. The next prime is 85858697. The reversal of 85858681 is 18685858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85729081 + 129600 = 9259^2 + 360^2 .

It is a cyclic number.

It is not a de Polignac number, because 85858681 - 2³ = 85858673 is a prime.

It is a super-2 number, since 2×85858681² = 14743426206119522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85858601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42929340 + 42929341.

It is an arithmetic number, because the mean of its divisors is an integer number (42929341).

Almost surely, 2^85858681 is an apocalyptic number.

It is an amenable number.

85858681 is a deficient number, since it is larger than the sum of its proper divisors (1).

85858681 is an equidigital number, since it uses as much as digits as its factorization.

85858681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 614400, while the sum is 49.

The square root of 85858681 is about 9265.9959529454. The cubic root of 85858681 is about 441.1585874243.

The spelling of 85858681 in words is "eighty-five million, eight hundred fifty-eight thousand, six hundred eighty-one".