82689405 has 8 divisors (see below), whose sum is σ = 132303072. Its totient is φ = 44101008.

The previous prime is 82689391. The next prime is 82689419. The reversal of 82689405 is 50498628.

It is an interprime number because it is at equal distance from previous prime (82689391) and next prime (82689419).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 82689405 - 2¹¹ = 82687357 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 (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2756299 + ... + 2756328.

It is an arithmetic number, because the mean of its divisors is an integer number (16537884).

Almost surely, 2^82689405 is an apocalyptic number.

It is an amenable number.

82689405 is a deficient number, since it is larger than the sum of its proper divisors (49613667).

82689405 is a wasteful number, since it uses less digits than its factorization.

82689405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5512635.

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 82689405 is about 9093.3714869679. The cubic root of 82689405 is about 435.6622756414.

The spelling of 82689405 in words is "eighty-two million, six hundred eighty-nine thousand, four hundred five".