7688605 has 4 divisors (see below), whose sum is σ = 9226332. Its totient is φ = 6150880.

The previous prime is 7688591. The next prime is 7688627. The reversal of 7688605 is 5068867.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6095961 + 1592644 = 2469^2 + 1262^2 .

It is a de Polignac number, because none of the positive numbers 2^k-7688605 is a prime.

It is a super-2 number, since 2×7688605² = 118229293692050, which contains 22 as substring.

It is a Duffinian number.

7688605 is a lucky number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 768856 + ... + 768865.

It is an arithmetic number, because the mean of its divisors is an integer number (2306583).

Almost surely, 2^7688605 is an apocalyptic number.

It is an amenable number.

7688605 is a deficient number, since it is larger than the sum of its proper divisors (1537727).

7688605 is a wasteful number, since it uses less digits than its factorization.

7688605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1537726.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 7688605 is about 2772.8333884314. The cubic root of 7688605 is about 197.3706250920.

The spelling of 7688605 in words is "seven million, six hundred eighty-eight thousand, six hundred five".