307980769 has 2 divisors, whose sum is σ = 307980770. Its totient is φ = 307980768.

The previous prime is 307980737. The next prime is 307980779. The reversal of 307980769 is 967089703.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 237622225 + 70358544 = 15415^2 + 8388^2 .

It is an emirp because it is prime and its reverse (967089703) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 307980769 - 2⁵ = 307980737 is a prime.

It is a super-2 number, since 2×307980769² = 189704308147662722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (307980719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153990384 + 153990385.

It is an arithmetic number, because the mean of its divisors is an integer number (153990385).

Almost surely, 2^307980769 is an apocalyptic number.

It is an amenable number.

307980769 is a deficient number, since it is larger than the sum of its proper divisors (1).

307980769 is an equidigital number, since it uses as much as digits as its factorization.

307980769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 571536, while the sum is 49.

The square root of 307980769 is about 17549.3808722701. The cubic root of 307980769 is about 675.3172858606.

The spelling of 307980769 in words is "three hundred seven million, nine hundred eighty thousand, seven hundred sixty-nine".