308611388947 has 2 divisors, whose sum is σ = 308611388948. Its totient is φ = 308611388946.

The previous prime is 308611388941. The next prime is 308611388993. The reversal of 308611388947 is 749883116803.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-308611388947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 308611388891 and 308611388900.

It is not a weakly prime, because it can be changed into another prime (308611388941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154305694473 + 154305694474.

It is an arithmetic number, because the mean of its divisors is an integer number (154305694474).

Almost surely, 2^308611388947 is an apocalyptic number.

308611388947 is a deficient number, since it is larger than the sum of its proper divisors (1).

308611388947 is an equidigital number, since it uses as much as digits as its factorization.

308611388947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6967296, while the sum is 58.

The spelling of 308611388947 in words is "three hundred eight billion, six hundred eleven million, three hundred eighty-eight thousand, nine hundred forty-seven".