7880641 has 2 divisors, whose sum is σ = 7880642. Its totient is φ = 7880640.

The previous prime is 7880627. The next prime is 7880659. The reversal of 7880641 is 1460887.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7862416 + 18225 = 2804^2 + 135^2 .

It is an emirp because it is prime and its reverse (1460887) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7880641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7880597 and 7880606.

It is not a weakly prime, because it can be changed into another prime (7880671) 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 as a sum of consecutive naturals, namely, 3940320 + 3940321.

It is an arithmetic number, because the mean of its divisors is an integer number (3940321).

Almost surely, 2^7880641 is an apocalyptic number.

It is an amenable number.

7880641 is a deficient number, since it is larger than the sum of its proper divisors (1).

7880641 is an equidigital number, since it uses as much as digits as its factorization.

7880641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 7880641 is about 2807.2479405995. The cubic root of 7880641 is about 199.0003535258. Note that the first 3 decimals are identical.

The spelling of 7880641 in words is "seven million, eight hundred eighty thousand, six hundred forty-one".