394033369669 has 2 divisors, whose sum is σ = 394033369670. Its totient is φ = 394033369668.

The previous prime is 394033369637. The next prime is 394033369711. The reversal of 394033369669 is 966963330493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 326258016100 + 67775353569 = 571190^2 + 260337^2 .

It is a cyclic number.

It is not a de Polignac number, because 394033369669 - 2⁵ = 394033369637 is a prime.

It is a super-2 number, since 2×394033369669² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394033369969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197016684834 + 197016684835.

It is an arithmetic number, because the mean of its divisors is an integer number (197016684835).

Almost surely, 2^394033369669 is an apocalyptic number.

It is an amenable number.

394033369669 is a deficient number, since it is larger than the sum of its proper divisors (1).

394033369669 is an equidigital number, since it uses as much as digits as its factorization.

394033369669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51018336, while the sum is 61.

The spelling of 394033369669 in words is "three hundred ninety-four billion, thirty-three million, three hundred sixty-nine thousand, six hundred sixty-nine".