307680869 has 2 divisors, whose sum is σ = 307680870. Its totient is φ = 307680868.

The previous prime is 307680803. The next prime is 307680881. The reversal of 307680869 is 968086703.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 268468225 + 39212644 = 16385^2 + 6262^2 .

It is an emirp because it is prime and its reverse (968086703) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-307680869 is a prime.

It is a super-2 number, since 2×307680869² = 189335034297190322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (307680899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153840434 + 153840435.

It is an arithmetic number, because the mean of its divisors is an integer number (153840435).

Almost surely, 2^307680869 is an apocalyptic number.

It is an amenable number.

307680869 is a deficient number, since it is larger than the sum of its proper divisors (1).

307680869 is an equidigital number, since it uses as much as digits as its factorization.

307680869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 307680869 is about 17540.8343302136. The cubic root of 307680869 is about 675.0980152135.

The spelling of 307680869 in words is "three hundred seven million, six hundred eighty thousand, eight hundred sixty-nine".