6345121997 has 2 divisors, whose sum is σ = 6345121998. Its totient is φ = 6345121996.

The previous prime is 6345121963. The next prime is 6345122039. The reversal of 6345121997 is 7991215436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3516371401 + 2828750596 = 59299^2 + 53186^2 .

It is a cyclic number.

It is not a de Polignac number, because 6345121997 - 2³⁰ = 5271380173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6345121907) 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, 3172560998 + 3172560999.

It is an arithmetic number, because the mean of its divisors is an integer number (3172560999).

Almost surely, 2^6345121997 is an apocalyptic number.

It is an amenable number.

6345121997 is a deficient number, since it is larger than the sum of its proper divisors (1).

6345121997 is an equidigital number, since it uses as much as digits as its factorization.

6345121997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 47.

The square root of 6345121997 is about 79656.2740592353. The cubic root of 6345121997 is about 1851.3136029137.

The spelling of 6345121997 in words is "six billion, three hundred forty-five million, one hundred twenty-one thousand, nine hundred ninety-seven".