7678841 has 2 divisors, whose sum is σ = 7678842. Its totient is φ = 7678840.

The previous prime is 7678817. The next prime is 7678859. The reversal of 7678841 is 1488767.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7678441 + 400 = 2771^2 + 20^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7678841 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (7678861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3839420 + 3839421.

It is an arithmetic number, because the mean of its divisors is an integer number (3839421).

Almost surely, 2^7678841 is an apocalyptic number.

It is an amenable number.

7678841 is a deficient number, since it is larger than the sum of its proper divisors (1).

7678841 is an equidigital number, since it uses as much as digits as its factorization.

7678841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75264, while the sum is 41.

The square root of 7678841 is about 2771.0721751697. The cubic root of 7678841 is about 197.2870406562.

The spelling of 7678841 in words is "seven million, six hundred seventy-eight thousand, eight hundred forty-one".