85705079 has 2 divisors, whose sum is σ = 85705080. Its totient is φ = 85705078.

The previous prime is 85705057. The next prime is 85705093. The reversal of 85705079 is 97050758.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85705079 - 2⁸ = 85704823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85705099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42852539 + 42852540.

It is an arithmetic number, because the mean of its divisors is an integer number (42852540).

Almost surely, 2^85705079 is an apocalyptic number.

85705079 is a deficient number, since it is larger than the sum of its proper divisors (1).

85705079 is an equidigital number, since it uses as much as digits as its factorization.

85705079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 88200, while the sum is 41.

The square root of 85705079 is about 9257.7037649733. The cubic root of 85705079 is about 440.8953514097.

The spelling of 85705079 in words is "eighty-five million, seven hundred five thousand, seventy-nine".