7681705 has 8 divisors (see below), whose sum is σ = 9760392. Its totient is φ = 5783808.

The previous prime is 7681693. The next prime is 7681711. The reversal of 7681705 is 5071867.

It can be written as a sum of positive squares in 4 ways, for example, as 80656 + 7601049 = 284^2 + 2757^2 .

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

It is not a de Polignac number, because 7681705 - 2⁷ = 7681577 is a prime.

It is a Duffinian number.

7681705 is a lucky number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45102 + ... + 45271.

It is an arithmetic number, because the mean of its divisors is an integer number (1220049).

Almost surely, 2^7681705 is an apocalyptic number.

It is an amenable number.

7681705 is a deficient number, since it is larger than the sum of its proper divisors (2078687).

7681705 is a wasteful number, since it uses less digits than its factorization.

7681705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90395.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 7681705 is about 2771.5888944791. The cubic root of 7681705 is about 197.3115651841.

The spelling of 7681705 in words is "seven million, six hundred eighty-one thousand, seven hundred five".