85741729 has 2 divisors, whose sum is σ = 85741730. Its totient is φ = 85741728.

The previous prime is 85741697. The next prime is 85741763. The reversal of 85741729 is 92714758.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85525504 + 216225 = 9248^2 + 465^2 .

It is a cyclic number.

It is not a de Polignac number, because 85741729 - 2⁵ = 85741697 is a prime.

It is not a weakly prime, because it can be changed into another prime (85711729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42870864 + 42870865.

It is an arithmetic number, because the mean of its divisors is an integer number (42870865).

Almost surely, 2^85741729 is an apocalyptic number.

It is an amenable number.

85741729 is a deficient number, since it is larger than the sum of its proper divisors (1).

85741729 is an equidigital number, since it uses as much as digits as its factorization.

85741729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 43.

The square root of 85741729 is about 9259.6829859342. The cubic root of 85741729 is about 440.9581890386.

The spelling of 85741729 in words is "eighty-five million, seven hundred forty-one thousand, seven hundred twenty-nine".