393897292697 has 2 divisors, whose sum is σ = 393897292698. Its totient is φ = 393897292696.

The previous prime is 393897292669. The next prime is 393897292741. The reversal of 393897292697 is 796292798393.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 361043555161 + 32853737536 = 600869^2 + 181256^2 .

It is a cyclic number.

It is not a de Polignac number, because 393897292697 - 2³⁶ = 325177815961 is a prime.

It is not a weakly prime, because it can be changed into another prime (393897295697) 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, 196948646348 + 196948646349.

It is an arithmetic number, because the mean of its divisors is an integer number (196948646349).

Almost surely, 2^393897292697 is an apocalyptic number.

It is an amenable number.

393897292697 is a deficient number, since it is larger than the sum of its proper divisors (1).

393897292697 is an equidigital number, since it uses as much as digits as its factorization.

393897292697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 555532992, while the sum is 74.

The spelling of 393897292697 in words is "three hundred ninety-three billion, eight hundred ninety-seven million, two hundred ninety-two thousand, six hundred ninety-seven".