306396999971 has 2 divisors, whose sum is σ = 306396999972. Its totient is φ = 306396999970.

The previous prime is 306396999949. The next prime is 306396999973. The reversal of 306396999971 is 179999693603.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 306396999971 - 2¹⁸ = 306396737827 is a prime.

Together with 306396999973, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 306396999895 and 306396999904.

It is not a weakly prime, because it can be changed into another prime (306396999973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153198499985 + 153198499986.

It is an arithmetic number, because the mean of its divisors is an integer number (153198499986).

Almost surely, 2^306396999971 is an apocalyptic number.

306396999971 is a deficient number, since it is larger than the sum of its proper divisors (1).

306396999971 is an equidigital number, since it uses as much as digits as its factorization.

306396999971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 133923132, while the sum is 71.

The spelling of 306396999971 in words is "three hundred six billion, three hundred ninety-six million, nine hundred ninety-nine thousand, nine hundred seventy-one".