309680071 has 2 divisors, whose sum is σ = 309680072. Its totient is φ = 309680070.

The previous prime is 309680057. The next prime is 309680081. The reversal of 309680071 is 170086903.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 309680071 - 2¹¹ = 309678023 is a prime.

It is equal to p_16748134 and since 309680071 and 16748134 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (309680051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154840035 + 154840036.

It is an arithmetic number, because the mean of its divisors is an integer number (154840036).

Almost surely, 2^309680071 is an apocalyptic number.

309680071 is a deficient number, since it is larger than the sum of its proper divisors (1).

309680071 is an equidigital number, since it uses as much as digits as its factorization.

309680071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 309680071 is about 17597.7291432730. The cubic root of 309680071 is about 676.5570427809.

The spelling of 309680071 in words is "three hundred nine million, six hundred eighty thousand, seventy-one".