82543905 has 12 divisors (see below), whose sum is σ = 143076180. Its totient is φ = 44023392.

The previous prime is 82543883. The next prime is 82543913. The reversal of 82543905 is 50934528.

It can be written as a sum of positive squares in 2 ways, for example, as 43718544 + 38825361 = 6612^2 + 6231^2 .

It is not a de Polignac number, because 82543905 - 2⁶ = 82543841 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 82543905.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 917110 + ... + 917199.

It is an arithmetic number, because the mean of its divisors is an integer number (11923015).

Almost surely, 2^82543905 is an apocalyptic number.

It is an amenable number.

82543905 is a deficient number, since it is larger than the sum of its proper divisors (60532275).

82543905 is a wasteful number, since it uses less digits than its factorization.

82543905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1834320 (or 1834317 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 82543905 is about 9085.3676315271. The cubic root of 82543905 is about 435.4065956580.

The spelling of 82543905 in words is "eighty-two million, five hundred forty-three thousand, nine hundred five".