394616729057 has 2 divisors, whose sum is σ = 394616729058. Its totient is φ = 394616729056.

The previous prime is 394616729021. The next prime is 394616729071. The reversal of 394616729057 is 750927616493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 273344934976 + 121271794081 = 522824^2 + 348241^2 .

It is a cyclic number.

It is not a de Polignac number, because 394616729057 - 2¹² = 394616724961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 394616728987 and 394616729005.

It is not a weakly prime, because it can be changed into another prime (394616728057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197308364528 + 197308364529.

It is an arithmetic number, because the mean of its divisors is an integer number (197308364529).

Almost surely, 2^394616729057 is an apocalyptic number.

It is an amenable number.

394616729057 is a deficient number, since it is larger than the sum of its proper divisors (1).

394616729057 is an equidigital number, since it uses as much as digits as its factorization.

394616729057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17146080, while the sum is 59.

The spelling of 394616729057 in words is "three hundred ninety-four billion, six hundred sixteen million, seven hundred twenty-nine thousand, fifty-seven".