85708039 has 2 divisors, whose sum is σ = 85708040. Its totient is φ = 85708038.

The previous prime is 85708037. The next prime is 85708093. The reversal of 85708039 is 93080758.

Together with next prime (85708093) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85708039 - 2¹ = 85708037 is a prime.

Together with 85708037, it forms a pair of twin primes.

It is equal to p_4982467 and since 85708039 and 4982467 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 85707992 and 85708010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85708037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42854019 + 42854020.

It is an arithmetic number, because the mean of its divisors is an integer number (42854020).

Almost surely, 2^85708039 is an apocalyptic number.

85708039 is a deficient number, since it is larger than the sum of its proper divisors (1).

85708039 is an equidigital number, since it uses as much as digits as its factorization.

85708039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 85708039 is about 9257.8636304495. The cubic root of 85708039 is about 440.9004270919.

The spelling of 85708039 in words is "eighty-five million, seven hundred eight thousand, thirty-nine".