85989493 has 2 divisors, whose sum is σ = 85989494. Its totient is φ = 85989492.

The previous prime is 85989467. The next prime is 85989511. The reversal of 85989493 is 39498958.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78110244 + 7879249 = 8838^2 + 2807^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85989493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85989403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42994746 + 42994747.

It is an arithmetic number, because the mean of its divisors is an integer number (42994747).

Almost surely, 2^85989493 is an apocalyptic number.

It is an amenable number.

85989493 is a deficient number, since it is larger than the sum of its proper divisors (1).

85989493 is an equidigital number, since it uses as much as digits as its factorization.

85989493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2799360, while the sum is 55.

The square root of 85989493 is about 9273.0519787177. The cubic root of 85989493 is about 441.3825195624.

The spelling of 85989493 in words is "eighty-five million, nine hundred eighty-nine thousand, four hundred ninety-three".