82681405 has 16 divisors (see below), whose sum is σ = 100742400. Its totient is φ = 65136960.

The previous prime is 82681367. The next prime is 82681411. The reversal of 82681405 is 50418628.

It is not a de Polignac number, because 82681405 - 2⁹ = 82680893 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114636 + ... + 115354.

It is an arithmetic number, because the mean of its divisors is an integer number (6296400).

Almost surely, 2^82681405 is an apocalyptic number.

It is an amenable number.

82681405 is a deficient number, since it is larger than the sum of its proper divisors (18060995).

82681405 is a wasteful number, since it uses less digits than its factorization.

82681405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 82681405 is about 9092.9315954757. The cubic root of 82681405 is about 435.6482254310.

The spelling of 82681405 in words is "eighty-two million, six hundred eighty-one thousand, four hundred five".