85784749 has 2 divisors, whose sum is σ = 85784750. Its totient is φ = 85784748.

The previous prime is 85784731. The next prime is 85784819. The reversal of 85784749 is 94748758.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75429225 + 10355524 = 8685^2 + 3218^2 .

It is a cyclic number.

It is not a de Polignac number, because 85784749 - 2⁵ = 85784717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85784696 and 85784705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85781749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42892374 + 42892375.

It is an arithmetic number, because the mean of its divisors is an integer number (42892375).

Almost surely, 2^85784749 is an apocalyptic number.

It is an amenable number.

85784749 is a deficient number, since it is larger than the sum of its proper divisors (1).

85784749 is an equidigital number, since it uses as much as digits as its factorization.

85784749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2257920, while the sum is 52.

The square root of 85784749 is about 9262.0056683204. The cubic root of 85784749 is about 441.0319254006.

The spelling of 85784749 in words is "eighty-five million, seven hundred eighty-four thousand, seven hundred forty-nine".