394149064663 has 2 divisors, whose sum is σ = 394149064664. Its totient is φ = 394149064662.

The previous prime is 394149064637. The next prime is 394149064679. The reversal of 394149064663 is 366460941493.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 394149064663 - 2¹³ = 394149056471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394149062663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197074532331 + 197074532332.

It is an arithmetic number, because the mean of its divisors is an integer number (197074532332).

Almost surely, 2^394149064663 is an apocalyptic number.

394149064663 is a deficient number, since it is larger than the sum of its proper divisors (1).

394149064663 is an equidigital number, since it uses as much as digits as its factorization.

394149064663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10077696, while the sum is 55.

The spelling of 394149064663 in words is "three hundred ninety-four billion, one hundred forty-nine million, sixty-four thousand, six hundred sixty-three".