82686549 has 16 divisors (see below), whose sum is σ = 123070464. Its totient is φ = 48946800.

The previous prime is 82686533. The next prime is 82686557. The reversal of 82686549 is 94568628.

It is a happy number.

It is not a de Polignac number, because 82686549 - 2⁴ = 82686533 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 82686498 and 82686507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82686599) 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, 27717 + ... + 30554.

It is an arithmetic number, because the mean of its divisors is an integer number (7691904).

Almost surely, 2^82686549 is an apocalyptic number.

It is an amenable number.

82686549 is a deficient number, since it is larger than the sum of its proper divisors (40383915).

82686549 is a wasteful number, since it uses less digits than its factorization.

82686549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58328.

The product of its digits is 829440, while the sum is 48.

The square root of 82686549 is about 9093.2144481476. The cubic root of 82686549 is about 435.6572598203.

The spelling of 82686549 in words is "eighty-two million, six hundred eighty-six thousand, five hundred forty-nine".