85139177 has 2 divisors, whose sum is σ = 85139178. Its totient is φ = 85139176.

The previous prime is 85139167. The next prime is 85139189. The reversal of 85139177 is 77193158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81793936 + 3345241 = 9044^2 + 1829^2 .

It is a cyclic number.

It is not a de Polignac number, because 85139177 - 2¹² = 85135081 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85139107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42569588 + 42569589.

It is an arithmetic number, because the mean of its divisors is an integer number (42569589).

Almost surely, 2^85139177 is an apocalyptic number.

It is an amenable number.

85139177 is a deficient number, since it is larger than the sum of its proper divisors (1).

85139177 is an equidigital number, since it uses as much as digits as its factorization.

85139177 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 41.

The square root of 85139177 is about 9227.0893027000. The cubic root of 85139177 is about 439.9228118731.

The spelling of 85139177 in words is "eighty-five million, one hundred thirty-nine thousand, one hundred seventy-seven".