7641289 has 2 divisors, whose sum is σ = 7641290. Its totient is φ = 7641288.

The previous prime is 7641281. The next prime is 7641311. The reversal of 7641289 is 9821467.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7333264 + 308025 = 2708^2 + 555^2 .

It is a cyclic number.

It is not a de Polignac number, because 7641289 - 2³ = 7641281 is a prime.

It is not a weakly prime, because it can be changed into another prime (7641281) 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, 3820644 + 3820645.

It is an arithmetic number, because the mean of its divisors is an integer number (3820645).

Almost surely, 2^7641289 is an apocalyptic number.

It is an amenable number.

7641289 is a deficient number, since it is larger than the sum of its proper divisors (1).

7641289 is an equidigital number, since it uses as much as digits as its factorization.

7641289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 37.

The square root of 7641289 is about 2764.2881542994. The cubic root of 7641289 is about 196.9649159781.

The spelling of 7641289 in words is "seven million, six hundred forty-one thousand, two hundred eighty-nine".