7657643 has 8 divisors (see below), whose sum is σ = 9132288. Its totient is φ = 6278184.

The previous prime is 7657613. The next prime is 7657679. The reversal of 7657643 is 3467567.

7657643 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 a cyclic number.

It is not a de Polignac number, because 7657643 - 2⁶ = 7657579 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7657597 and 7657606.

It is not an unprimeable number, because it can be changed into a prime (7657613) 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, 23621 + ... + 23942.

It is an arithmetic number, because the mean of its divisors is an integer number (1141536).

Almost surely, 2^7657643 is an apocalyptic number.

7657643 is a deficient number, since it is larger than the sum of its proper divisors (1474645).

7657643 is a wasteful number, since it uses less digits than its factorization.

7657643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47593.

The product of its digits is 105840, while the sum is 38.

The square root of 7657643 is about 2767.2446585006. The cubic root of 7657643 is about 197.1053315969.

The spelling of 7657643 in words is "seven million, six hundred fifty-seven thousand, six hundred forty-three".