394396066249 has 2 divisors, whose sum is σ = 394396066250. Its totient is φ = 394396066248.

The previous prime is 394396066201. The next prime is 394396066261. The reversal of 394396066249 is 942660693493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 354211854649 + 40184211600 = 595157^2 + 200460^2 .

It is a cyclic number.

It is not a de Polignac number, because 394396066249 - 2¹¹ = 394396064201 is a prime.

It is not a weakly prime, because it can be changed into another prime (394396066849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197198033124 + 197198033125.

It is an arithmetic number, because the mean of its divisors is an integer number (197198033125).

Almost surely, 2^394396066249 is an apocalyptic number.

It is an amenable number.

394396066249 is a deficient number, since it is larger than the sum of its proper divisors (1).

394396066249 is an equidigital number, since it uses as much as digits as its factorization.

394396066249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45349632, while the sum is 61.

The spelling of 394396066249 in words is "three hundred ninety-four billion, three hundred ninety-six million, sixty-six thousand, two hundred forty-nine".