309726861966113 has 2 divisors, whose sum is σ = 309726861966114. Its totient is φ = 309726861966112.

The previous prime is 309726861966097. The next prime is 309726861966161. The reversal of 309726861966113 is 311669168627903.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 306766012179169 + 2960849786944 = 17514737^2 + 1720712^2 .

It is a cyclic number.

It is not a de Polignac number, because 309726861966113 - 2⁴ = 309726861966097 is a prime.

It is not a weakly prime, because it can be changed into another prime (309726861966713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154863430983056 + 154863430983057.

It is an arithmetic number, because the mean of its divisors is an integer number (154863430983057).

Almost surely, 2^{309726861966113} is an apocalyptic number.

It is an amenable number.

309726861966113 is a deficient number, since it is larger than the sum of its proper divisors (1).

309726861966113 is an equidigital number, since it uses as much as digits as its factorization.

309726861966113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105815808, while the sum is 68.

The spelling of 309726861966113 in words is "three hundred nine trillion, seven hundred twenty-six billion, eight hundred sixty-one million, nine hundred sixty-six thousand, one hundred thirteen".