85777943 has 2 divisors, whose sum is σ = 85777944. Its totient is φ = 85777942.

The previous prime is 85777921. The next prime is 85777957. The reversal of 85777943 is 34977758.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85777943 - 2⁸ = 85777687 is a prime.

It is a super-2 number, since 2×85777943² = 14715711010622498, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 85777891 and 85777900.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85777243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42888971 + 42888972.

It is an arithmetic number, because the mean of its divisors is an integer number (42888972).

Almost surely, 2^85777943 is an apocalyptic number.

85777943 is a deficient number, since it is larger than the sum of its proper divisors (1).

85777943 is an equidigital number, since it uses as much as digits as its factorization.

85777943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1481760, while the sum is 50.

The square root of 85777943 is about 9261.6382460124. The cubic root of 85777943 is about 441.0202615454.

The spelling of 85777943 in words is "eighty-five million, seven hundred seventy-seven thousand, nine hundred forty-three".