85474729 has 2 divisors, whose sum is σ = 85474730. Its totient is φ = 85474728.

The previous prime is 85474681. The next prime is 85474757. The reversal of 85474729 is 92747458.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78854400 + 6620329 = 8880^2 + 2573^2 .

It is a cyclic number.

It is not a de Polignac number, because 85474729 - 2¹⁹ = 84950441 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (85474789) 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, 42737364 + 42737365.

It is an arithmetic number, because the mean of its divisors is an integer number (42737365).

Almost surely, 2^85474729 is an apocalyptic number.

It is an amenable number.

85474729 is a deficient number, since it is larger than the sum of its proper divisors (1).

85474729 is an equidigital number, since it uses as much as digits as its factorization.

85474729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 46.

The square root of 85474729 is about 9245.2544042876. The cubic root of 85474729 is about 440.4999980674.

The spelling of 85474729 in words is "eighty-five million, four hundred seventy-four thousand, seven hundred twenty-nine".