7804681 has 2 divisors, whose sum is σ = 7804682. Its totient is φ = 7804680.

The previous prime is 7804673. The next prime is 7804703. The reversal of 7804681 is 1864087.

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., 7513081 + 291600 = 2741^2 + 540^2 .

It is an emirp because it is prime and its reverse (1864087) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7804681 - 2³ = 7804673 is a prime.

It is a super-2 number, since 2×7804681² = 121826091023522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7804631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3902340 + 3902341.

It is an arithmetic number, because the mean of its divisors is an integer number (3902341).

Almost surely, 2^7804681 is an apocalyptic number.

It is an amenable number.

7804681 is a deficient number, since it is larger than the sum of its proper divisors (1).

7804681 is an equidigital number, since it uses as much as digits as its factorization.

7804681 is an evil number, because the sum of its binary digits is even.

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

The square root of 7804681 is about 2793.6859164910. The cubic root of 7804681 is about 198.3589126594.

The spelling of 7804681 in words is "seven million, eight hundred four thousand, six hundred eighty-one".