394538040049 has 2 divisors, whose sum is σ = 394538040050. Its totient is φ = 394538040048.

The previous prime is 394538039941. The next prime is 394538040059. The reversal of 394538040049 is 940040835493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 379554566400 + 14983473649 = 616080^2 + 122407^2 .

It is a cyclic number.

It is not a de Polignac number, because 394538040049 - 2⁹ = 394538039537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 394538039984 and 394538040011.

It is not a weakly prime, because it can be changed into another prime (394538040059) 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, 197269020024 + 197269020025.

It is an arithmetic number, because the mean of its divisors is an integer number (197269020025).

Almost surely, 2^394538040049 is an apocalyptic number.

It is an amenable number.

394538040049 is a deficient number, since it is larger than the sum of its proper divisors (1).

394538040049 is an equidigital number, since it uses as much as digits as its factorization.

394538040049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1866240, while the sum is 49.

The spelling of 394538040049 in words is "three hundred ninety-four billion, five hundred thirty-eight million, forty thousand, forty-nine".