394161768037 has 2 divisors, whose sum is σ = 394161768038. Its totient is φ = 394161768036.

The previous prime is 394161767977. The next prime is 394161768043. The reversal of 394161768037 is 730867161493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228910574916 + 165251193121 = 478446^2 + 406511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394161768037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394161768097) 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, 197080884018 + 197080884019.

It is an arithmetic number, because the mean of its divisors is an integer number (197080884019).

Almost surely, 2^394161768037 is an apocalyptic number.

It is an amenable number.

394161768037 is a deficient number, since it is larger than the sum of its proper divisors (1).

394161768037 is an equidigital number, since it uses as much as digits as its factorization.

394161768037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4572288, while the sum is 55.

The spelling of 394161768037 in words is "three hundred ninety-four billion, one hundred sixty-one million, seven hundred sixty-eight thousand, thirty-seven".