306681841 has 2 divisors, whose sum is σ = 306681842. Its totient is φ = 306681840.

The previous prime is 306681827. The next prime is 306681857. The reversal of 306681841 is 148186603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 305515441 + 1166400 = 17479^2 + 1080^2 .

It is a cyclic number.

It is not a de Polignac number, because 306681841 - 2⁹ = 306681329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 306681841.

It is not a weakly prime, because it can be changed into another prime (306681821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153340920 + 153340921.

It is an arithmetic number, because the mean of its divisors is an integer number (153340921).

Almost surely, 2^306681841 is an apocalyptic number.

It is an amenable number.

306681841 is a deficient number, since it is larger than the sum of its proper divisors (1).

306681841 is an equidigital number, since it uses as much as digits as its factorization.

306681841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 306681841 is about 17512.3339678068. Note that the first 3 decimals coincide. The cubic root of 306681841 is about 674.3665504938.

The spelling of 306681841 in words is "three hundred six million, six hundred eighty-one thousand, eight hundred forty-one".