394454454517 has 2 divisors, whose sum is σ = 394454454518. Its totient is φ = 394454454516.

The previous prime is 394454454463. The next prime is 394454454529. The reversal of 394454454517 is 715454454493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 384947034481 + 9507420036 = 620441^2 + 97506^2 .

It is an emirp because it is prime and its reverse (715454454493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 394454454517 - 2¹⁹ = 394453930229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394454454217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197227227258 + 197227227259.

It is an arithmetic number, because the mean of its divisors is an integer number (197227227259).

Almost surely, 2^394454454517 is an apocalyptic number.

It is an amenable number.

394454454517 is a deficient number, since it is larger than the sum of its proper divisors (1).

394454454517 is an equidigital number, since it uses as much as digits as its factorization.

394454454517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192000, while the sum is 55.

The spelling of 394454454517 in words is "three hundred ninety-four billion, four hundred fifty-four million, four hundred fifty-four thousand, five hundred seventeen".