85378771 has 2 divisors, whose sum is σ = 85378772. Its totient is φ = 85378770.

The previous prime is 85378753. The next prime is 85378793. The reversal of 85378771 is 17787358.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85378771 - 2¹⁵ = 85346003 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85378751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42689385 + 42689386.

It is an arithmetic number, because the mean of its divisors is an integer number (42689386).

Almost surely, 2^85378771 is an apocalyptic number.

85378771 is a deficient number, since it is larger than the sum of its proper divisors (1).

85378771 is an equidigital number, since it uses as much as digits as its factorization.

85378771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 329280, while the sum is 46.

The square root of 85378771 is about 9240.0633655836. The cubic root of 85378771 is about 440.3350942528.

The spelling of 85378771 in words is "eighty-five million, three hundred seventy-eight thousand, seven hundred seventy-one".