7646729 has 2 divisors, whose sum is σ = 7646730. Its totient is φ = 7646728.

The previous prime is 7646711. The next prime is 7646731. The reversal of 7646729 is 9276467.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7507600 + 139129 = 2740^2 + 373^2 .

It is a cyclic number.

It is not a de Polignac number, because 7646729 - 2⁸ = 7646473 is a prime.

Together with 7646731, it forms a pair of twin primes.

It is a Chen prime.

It is a d-powerful number, because it can be written as 7⁷ + 6⁴ + 4¹⁰ + 6⁵ + 7⁸ + 2³ + 9³ .

It is not a weakly prime, because it can be changed into another prime (7646789) 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, 3823364 + 3823365.

It is an arithmetic number, because the mean of its divisors is an integer number (3823365).

Almost surely, 2^7646729 is an apocalyptic number.

It is an amenable number.

7646729 is a deficient number, since it is larger than the sum of its proper divisors (1).

7646729 is an equidigital number, since it uses as much as digits as its factorization.

7646729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 41.

The square root of 7646729 is about 2765.2719576924. The cubic root of 7646729 is about 197.0116460945.

The spelling of 7646729 in words is "seven million, six hundred forty-six thousand, seven hundred twenty-nine".