85765879 has 2 divisors, whose sum is σ = 85765880. Its totient is φ = 85765878.

The previous prime is 85765877. The next prime is 85765907. The reversal of 85765879 is 97856758.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85765879 - 2¹ = 85765877 is a prime.

Together with 85765877, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85765877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42882939 + 42882940.

It is an arithmetic number, because the mean of its divisors is an integer number (42882940).

Almost surely, 2^85765879 is an apocalyptic number.

85765879 is a deficient number, since it is larger than the sum of its proper divisors (1).

85765879 is an equidigital number, since it uses as much as digits as its factorization.

85765879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4233600, while the sum is 55.

The square root of 85765879 is about 9260.9869344471. The cubic root of 85765879 is about 440.9995852204. Note that the first 3 decimals are identical.

The spelling of 85765879 in words is "eighty-five million, seven hundred sixty-five thousand, eight hundred seventy-nine".