7678649 has 8 divisors (see below), whose sum is σ = 8665920. Its totient is φ = 6739600.

The previous prime is 7678637. The next prime is 7678661. The reversal of 7678649 is 9468767.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7678637) and next prime (7678661).

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

It is not a de Polignac number, because 7678649 - 2⁴ = 7678633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7678609) by changing a digit.

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, 11717 + ... + 12354.

It is an arithmetic number, because the mean of its divisors is an integer number (1083240).

Almost surely, 2^7678649 is an apocalyptic number.

It is an amenable number.

7678649 is a deficient number, since it is larger than the sum of its proper divisors (987271).

7678649 is a wasteful number, since it uses less digits than its factorization.

7678649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24111.

The product of its digits is 508032, while the sum is 47.

The square root of 7678649 is about 2771.0375313229. The cubic root of 7678649 is about 197.2853963357.

The spelling of 7678649 in words is "seven million, six hundred seventy-eight thousand, six hundred forty-nine".