85505293 has 2 divisors, whose sum is σ = 85505294. Its totient is φ = 85505292.

The previous prime is 85505279. The next prime is 85505297. The reversal of 85505293 is 39250558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73582084 + 11923209 = 8578^2 + 3453^2 .

It is a cyclic number.

It is not a de Polignac number, because 85505293 - 2²¹ = 83408141 is a prime.

It is a super-2 number, since 2×85505293² = 14622310262031698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85505297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42752646 + 42752647.

It is an arithmetic number, because the mean of its divisors is an integer number (42752647).

Almost surely, 2^85505293 is an apocalyptic number.

It is an amenable number.

85505293 is a deficient number, since it is larger than the sum of its proper divisors (1).

85505293 is an equidigital number, since it uses as much as digits as its factorization.

85505293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54000, while the sum is 37.

The square root of 85505293 is about 9246.9072126847. The cubic root of 85505293 is about 440.5524963815.

The spelling of 85505293 in words is "eighty-five million, five hundred five thousand, two hundred ninety-three".