85939771 has 2 divisors, whose sum is σ = 85939772. Its totient is φ = 85939770.

The previous prime is 85939747. The next prime is 85939783. The reversal of 85939771 is 17793958.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85939771 - 2⁵ = 85939739 is a prime.

It is not a weakly prime, because it can be changed into another prime (85939571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42969885 + 42969886.

It is an arithmetic number, because the mean of its divisors is an integer number (42969886).

Almost surely, 2^85939771 is an apocalyptic number.

85939771 is a deficient number, since it is larger than the sum of its proper divisors (1).

85939771 is an equidigital number, since it uses as much as digits as its factorization.

85939771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476280, while the sum is 49.

The square root of 85939771 is about 9270.3705966914. The cubic root of 85939771 is about 441.2974291160.

The spelling of 85939771 in words is "eighty-five million, nine hundred thirty-nine thousand, seven hundred seventy-one".