247993378097 has 2 divisors, whose sum is σ = 247993378098. Its totient is φ = 247993378096.

The previous prime is 247993378043. The next prime is 247993378187. The reversal of 247993378097 is 790873399742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210732411136 + 37260966961 = 459056^2 + 193031^2 .

It is a cyclic number.

It is not a de Polignac number, because 247993378097 - 2¹² = 247993374001 is a prime.

It is not a weakly prime, because it can be changed into another prime (247993378697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123996689048 + 123996689049.

It is an arithmetic number, because the mean of its divisors is an integer number (123996689049).

Almost surely, 2^247993378097 is an apocalyptic number.

It is an amenable number.

247993378097 is a deficient number, since it is larger than the sum of its proper divisors (1).

247993378097 is an equidigital number, since it uses as much as digits as its factorization.

247993378097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144027072, while the sum is 68.

The spelling of 247993378097 in words is "two hundred forty-seven billion, nine hundred ninety-three million, three hundred seventy-eight thousand, ninety-seven".