85619771 has 2 divisors, whose sum is σ = 85619772. Its totient is φ = 85619770.

The previous prime is 85619749. The next prime is 85619789. The reversal of 85619771 is 17791658.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85619771 - 2⁶ = 85619707 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85619711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42809885 + 42809886.

It is an arithmetic number, because the mean of its divisors is an integer number (42809886).

Almost surely, 2^85619771 is an apocalyptic number.

85619771 is a deficient number, since it is larger than the sum of its proper divisors (1).

85619771 is an equidigital number, since it uses as much as digits as its factorization.

85619771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 44.

The square root of 85619771 is about 9253.0952118737. The cubic root of 85619771 is about 440.7490186323.

The spelling of 85619771 in words is "eighty-five million, six hundred nineteen thousand, seven hundred seventy-one".