238356561697 has 2 divisors, whose sum is σ = 238356561698. Its totient is φ = 238356561696.

The previous prime is 238356561691. The next prime is 238356561713. The reversal of 238356561697 is 796165653832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124636535521 + 113720026176 = 353039^2 + 337224^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238356561697 is a prime.

It is not a weakly prime, because it can be changed into another prime (238356561691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119178280848 + 119178280849.

It is an arithmetic number, because the mean of its divisors is an integer number (119178280849).

Almost surely, 2^238356561697 is an apocalyptic number.

It is an amenable number.

238356561697 is a deficient number, since it is larger than the sum of its proper divisors (1).

238356561697 is an equidigital number, since it uses as much as digits as its factorization.

238356561697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48988800, while the sum is 61.

The spelling of 238356561697 in words is "two hundred thirty-eight billion, three hundred fifty-six million, five hundred sixty-one thousand, six hundred ninety-seven".