309468769 has 2 divisors, whose sum is σ = 309468770. Its totient is φ = 309468768.

The previous prime is 309468763. The next prime is 309468787. The reversal of 309468769 is 967864903.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167573025 + 141895744 = 12945^2 + 11912^2 .

It is a cyclic number.

It is not a de Polignac number, because 309468769 - 2¹³ = 309460577 is a prime.

It is a super-2 number, since 2×309468769² = 191541837972750722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (309468763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154734384 + 154734385.

It is an arithmetic number, because the mean of its divisors is an integer number (154734385).

Almost surely, 2^309468769 is an apocalyptic number.

It is an amenable number.

309468769 is a deficient number, since it is larger than the sum of its proper divisors (1).

309468769 is an equidigital number, since it uses as much as digits as its factorization.

309468769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 52.

The square root of 309468769 is about 17591.7244464549. The cubic root of 309468769 is about 676.4031308392.

The spelling of 309468769 in words is "three hundred nine million, four hundred sixty-eight thousand, seven hundred sixty-nine".