394538039941 has 2 divisors, whose sum is σ = 394538039942. Its totient is φ = 394538039940.

The previous prime is 394538039939. The next prime is 394538040049. The reversal of 394538039941 is 149930835493.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 394316178916 + 221861025 = 627946^2 + 14895^2 .

It is a cyclic number.

It is not a de Polignac number, because 394538039941 - 2¹ = 394538039939 is a prime.

It is a super-2 number, since 2×394538039941² (a number of 24 digits) contains 22 as substring.

Together with 394538039939, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394538039641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197269019970 + 197269019971.

It is an arithmetic number, because the mean of its divisors is an integer number (197269019971).

Almost surely, 2^394538039941 is an apocalyptic number.

It is an amenable number.

394538039941 is a deficient number, since it is larger than the sum of its proper divisors (1).

394538039941 is an equidigital number, since it uses as much as digits as its factorization.

394538039941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12597120, while the sum is 58.

The spelling of 394538039941 in words is "three hundred ninety-four billion, five hundred thirty-eight million, thirty-nine thousand, nine hundred forty-one".