309849696349 has 2 divisors, whose sum is σ = 309849696350. Its totient is φ = 309849696348.

The previous prime is 309849696271. The next prime is 309849696353. The reversal of 309849696349 is 943696948903.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 303691370724 + 6158325625 = 551082^2 + 78475^2 .

It is a cyclic number.

It is not a de Polignac number, because 309849696349 - 2¹⁵ = 309849663581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (309849696449) 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, 154924848174 + 154924848175.

It is an arithmetic number, because the mean of its divisors is an integer number (154924848175).

Almost surely, 2^309849696349 is an apocalyptic number.

It is an amenable number.

309849696349 is a deficient number, since it is larger than the sum of its proper divisors (1).

309849696349 is an equidigital number, since it uses as much as digits as its factorization.

309849696349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272097792, while the sum is 70.

The spelling of 309849696349 in words is "three hundred nine billion, eight hundred forty-nine million, six hundred ninety-six thousand, three hundred forty-nine".