85771749 has 16 divisors (see below), whose sum is σ = 138388608. Its totient is φ = 46129152.

The previous prime is 85771747. The next prime is 85771753. The reversal of 85771749 is 94717758.

It is not a de Polignac number, because 85771749 - 2¹ = 85771747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85771698 and 85771707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85771747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119772 + ... + 120485.

It is an arithmetic number, because the mean of its divisors is an integer number (8649288).

Almost surely, 2^85771749 is an apocalyptic number.

It is an amenable number.

85771749 is a deficient number, since it is larger than the sum of its proper divisors (52616859).

85771749 is a wasteful number, since it uses less digits than its factorization.

85771749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240284.

The product of its digits is 493920, while the sum is 48.

The square root of 85771749 is about 9261.3038498907. The cubic root of 85771749 is about 441.0096459755.

The spelling of 85771749 in words is "eighty-five million, seven hundred seventy-one thousand, seven hundred forty-nine".