394867332389 has 2 divisors, whose sum is σ = 394867332390. Its totient is φ = 394867332388.

The previous prime is 394867332383. The next prime is 394867332403. The reversal of 394867332389 is 983233768493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 385274697025 + 9592635364 = 620705^2 + 97942^2 .

It is a cyclic number.

It is not a de Polignac number, because 394867332389 - 2¹² = 394867328293 is a prime.

It is a super-4 number, since 4×394867332389⁴ (a number of 47 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394867332383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197433666194 + 197433666195.

It is an arithmetic number, because the mean of its divisors is an integer number (197433666195).

Almost surely, 2^394867332389 is an apocalyptic number.

It is an amenable number.

394867332389 is a deficient number, since it is larger than the sum of its proper divisors (1).

394867332389 is an equidigital number, since it uses as much as digits as its factorization.

394867332389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141087744, while the sum is 65.

The spelling of 394867332389 in words is "three hundred ninety-four billion, eight hundred sixty-seven million, three hundred thirty-two thousand, three hundred eighty-nine".