82085769 has 6 divisors (see below), whose sum is σ = 118568346. Its totient is φ = 54723840.

The previous prime is 82085767. The next prime is 82085771. The reversal of 82085769 is 96758028.

It is an interprime number because it is at equal distance from previous prime (82085767) and next prime (82085771).

It can be written as a sum of positive squares in only one way, i.e., 65804544 + 16281225 = 8112^2 + 4035^2 .

It is not a de Polignac number, because 82085769 - 2¹ = 82085767 is a prime.

It is a super-2 number, since 2×82085769² = 13476146944642722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82085761) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4560312 + ... + 4560329.

It is an arithmetic number, because the mean of its divisors is an integer number (19761391).

Almost surely, 2^82085769 is an apocalyptic number.

It is an amenable number.

82085769 is a deficient number, since it is larger than the sum of its proper divisors (36482577).

82085769 is a wasteful number, since it uses less digits than its factorization.

82085769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9120647 (or 9120644 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 82085769 is about 9060.1197011960. The cubic root of 82085769 is about 434.5995680857.

The spelling of 82085769 in words is "eighty-two million, eighty-five thousand, seven hundred sixty-nine".