7688545 has 4 divisors (see below), whose sum is σ = 9226260. Its totient is φ = 6150832.

The previous prime is 7688543. The next prime is 7688561. The reversal of 7688545 is 5458867.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5458867 = 73 ⋅74779.

It can be written as a sum of positive squares in 2 ways, for example, as 1216609 + 6471936 = 1103^2 + 2544^2 .

It is a cyclic number.

It is not a de Polignac number, because 7688545 - 2¹ = 7688543 is a prime.

It is a super-2 number, since 2×7688545² = 118227448434050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7688543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 768850 + ... + 768859.

It is an arithmetic number, because the mean of its divisors is an integer number (2306565).

Almost surely, 2^7688545 is an apocalyptic number.

It is an amenable number.

7688545 is a deficient number, since it is larger than the sum of its proper divisors (1537715).

7688545 is a wasteful number, since it uses less digits than its factorization.

7688545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1537714.

The product of its digits is 268800, while the sum is 43.

The square root of 7688545 is about 2772.8225691522. The cubic root of 7688545 is about 197.3701116799.

The spelling of 7688545 in words is "seven million, six hundred eighty-eight thousand, five hundred forty-five".