7725643 has 4 divisors (see below), whose sum is σ = 7738128. Its totient is φ = 7713160.

The previous prime is 7725611. The next prime is 7725649. The reversal of 7725643 is 3465277.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7725643 - 2⁵ = 7725611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7725599 and 7725608.

It is not an unprimeable number, because it can be changed into a prime (7725649) 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 3 ways as a sum of consecutive naturals, for example, 5263 + ... + 6568.

It is an arithmetic number, because the mean of its divisors is an integer number (1934532).

Almost surely, 2^7725643 is an apocalyptic number.

7725643 is a deficient number, since it is larger than the sum of its proper divisors (12485).

7725643 is a wasteful number, since it uses less digits than its factorization.

7725643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12484.

The product of its digits is 35280, while the sum is 34.

The square root of 7725643 is about 2779.5040924597. The cubic root of 7725643 is about 197.6870460001.

The spelling of 7725643 in words is "seven million, seven hundred twenty-five thousand, six hundred forty-three".