7686845 has 4 divisors (see below), whose sum is σ = 9224220. Its totient is φ = 6149472.

The previous prime is 7686821. The next prime is 7686851. The reversal of 7686845 is 5486867.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5486867 = 569 ⋅9643.

It can be written as a sum of positive squares in 2 ways, for example, as 4084441 + 3602404 = 2021^2 + 1898^2 .

It is a cyclic number.

It is not a de Polignac number, because 7686845 - 2⁸ = 7686589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7686796 and 7686805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 768680 + ... + 768689.

It is an arithmetic number, because the mean of its divisors is an integer number (2306055).

Almost surely, 2^7686845 is an apocalyptic number.

It is an amenable number.

7686845 is a deficient number, since it is larger than the sum of its proper divisors (1537375).

7686845 is a wasteful number, since it uses less digits than its factorization.

7686845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537374.

The product of its digits is 322560, while the sum is 44.

The square root of 7686845 is about 2772.5160053641. The cubic root of 7686845 is about 197.3555638938.

The spelling of 7686845 in words is "seven million, six hundred eighty-six thousand, eight hundred forty-five".