7656529 has 2 divisors, whose sum is σ = 7656530. Its totient is φ = 7656528.

The previous prime is 7656527. The next prime is 7656533. The reversal of 7656529 is 9256567.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4601025 + 3055504 = 2145^2 + 1748^2 .

It is a cyclic number.

It is not a de Polignac number, because 7656529 - 2¹ = 7656527 is a prime.

Together with 7656527, it forms a pair of twin primes.

It is an alternating number because its digits alternate between odd and even.

7656529 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7656491 and 7656500.

It is not a weakly prime, because it can be changed into another prime (7656527) 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 as a sum of consecutive naturals, namely, 3828264 + 3828265.

It is an arithmetic number, because the mean of its divisors is an integer number (3828265).

Almost surely, 2^7656529 is an apocalyptic number.

It is an amenable number.

7656529 is a deficient number, since it is larger than the sum of its proper divisors (1).

7656529 is an equidigital number, since it uses as much as digits as its factorization.

7656529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 40.

The square root of 7656529 is about 2767.0433679290. The cubic root of 7656529 is about 197.0957731298.

The spelling of 7656529 in words is "seven million, six hundred fifty-six thousand, five hundred twenty-nine".