85785827 has 2 divisors, whose sum is σ = 85785828. Its totient is φ = 85785826.

The previous prime is 85785811. The next prime is 85785839. The reversal of 85785827 is 72858758.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85785827 - 2⁴ = 85785811 is a prime.

It is a super-2 number, since 2×85785827² = 14718416228147858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85785127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42892913 + 42892914.

It is an arithmetic number, because the mean of its divisors is an integer number (42892914).

Almost surely, 2^85785827 is an apocalyptic number.

85785827 is a deficient number, since it is larger than the sum of its proper divisors (1).

85785827 is an equidigital number, since it uses as much as digits as its factorization.

85785827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1254400, while the sum is 50.

The square root of 85785827 is about 9262.0638628764. The cubic root of 85785827 is about 441.0337727781.

The spelling of 85785827 in words is "eighty-five million, seven hundred eighty-five thousand, eight hundred twenty-seven".