7641647 has 8 divisors (see below), whose sum is σ = 8452416. Its totient is φ = 6862752.

The previous prime is 7641637. The next prime is 7641649. The reversal of 7641647 is 7461467.

It is a happy number.

7641647 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 7641647 - 2¹² = 7637551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7641649) 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, 7463 + ... + 8424.

It is an arithmetic number, because the mean of its divisors is an integer number (1056552).

Almost surely, 2^7641647 is an apocalyptic number.

7641647 is a deficient number, since it is larger than the sum of its proper divisors (810769).

7641647 is a wasteful number, since it uses less digits than its factorization.

7641647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15937.

The product of its digits is 28224, while the sum is 35.

The square root of 7641647 is about 2764.3529080058. The cubic root of 7641647 is about 196.9679919138.

The spelling of 7641647 in words is "seven million, six hundred forty-one thousand, six hundred forty-seven".