85998481 has 2 divisors, whose sum is σ = 85998482. Its totient is φ = 85998480.

The previous prime is 85998467. The next prime is 85998491. The reversal of 85998481 is 18489958.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80281600 + 5716881 = 8960^2 + 2391^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85998481 is a prime.

It is a super-2 number, since 2×85998481² = 14791477468614722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85998401) 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, 42999240 + 42999241.

It is an arithmetic number, because the mean of its divisors is an integer number (42999241).

Almost surely, 2^85998481 is an apocalyptic number.

It is an amenable number.

85998481 is a deficient number, since it is larger than the sum of its proper divisors (1).

85998481 is an equidigital number, since it uses as much as digits as its factorization.

85998481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 829440, while the sum is 52.

The square root of 85998481 is about 9273.5365961428. The cubic root of 85998481 is about 441.3978974407.

The spelling of 85998481 in words is "eighty-five million, nine hundred ninety-eight thousand, four hundred eighty-one".