7977841 has 2 divisors, whose sum is σ = 7977842. Its totient is φ = 7977840.

The previous prime is 7977817. The next prime is 7977857. The reversal of 7977841 is 1487797.

7977841 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5664400 + 2313441 = 2380^2 + 1521^2 .

It is an emirp because it is prime and its reverse (1487797) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7977841 - 2⁷ = 7977713 is a prime.

7977841 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (7977241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3988920 + 3988921.

It is an arithmetic number, because the mean of its divisors is an integer number (3988921).

Almost surely, 2^7977841 is an apocalyptic number.

It is an amenable number.

7977841 is a deficient number, since it is larger than the sum of its proper divisors (1).

7977841 is an equidigital number, since it uses as much as digits as its factorization.

7977841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 98784, while the sum is 43.

The square root of 7977841 is about 2824.5072136569. The cubic root of 7977841 is about 199.8151709103.

The spelling of 7977841 in words is "seven million, nine hundred seventy-seven thousand, eight hundred forty-one".