85728707 has 2 divisors, whose sum is σ = 85728708. Its totient is φ = 85728706.

The previous prime is 85728691. The next prime is 85728743. The reversal of 85728707 is 70782758.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85728707 - 2⁴ = 85728691 is a prime.

It is a super-2 number, since 2×85728707² = 14698822407783698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85728787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42864353 + 42864354.

It is an arithmetic number, because the mean of its divisors is an integer number (42864354).

Almost surely, 2^85728707 is an apocalyptic number.

85728707 is a deficient number, since it is larger than the sum of its proper divisors (1).

85728707 is an equidigital number, since it uses as much as digits as its factorization.

85728707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 219520, while the sum is 44.

The square root of 85728707 is about 9258.9798034125. The cubic root of 85728707 is about 440.9358644431.

The spelling of 85728707 in words is "eighty-five million, seven hundred twenty-eight thousand, seven hundred seven".