1297188947 has 2 divisors, whose sum is σ = 1297188948. Its totient is φ = 1297188946.

The previous prime is 1297188931. The next prime is 1297189039. The reversal of 1297188947 is 7498817921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1297188947 - 2⁴ = 1297188931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1297188892 and 1297188901.

It is not a weakly prime, because it can be changed into another prime (1297188917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648594473 + 648594474.

It is an arithmetic number, because the mean of its divisors is an integer number (648594474).

Almost surely, 2^1297188947 is an apocalyptic number.

1297188947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297188947 is an equidigital number, since it uses as much as digits as its factorization.

1297188947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2032128, while the sum is 56.

The square root of 1297188947 is about 36016.5093672332. The cubic root of 1297188947 is about 1090.6056581294.

The spelling of 1297188947 in words is "one billion, two hundred ninety-seven million, one hundred eighty-eight thousand, nine hundred forty-seven".