394922732389 has 2 divisors, whose sum is σ = 394922732390. Its totient is φ = 394922732388.

The previous prime is 394922732383. The next prime is 394922732419. The reversal of 394922732389 is 983237229493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 295047771489 + 99874960900 = 543183^2 + 316030^2 .

It is a cyclic number.

It is not a de Polignac number, because 394922732389 - 2¹⁷ = 394922601317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394922732383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197461366194 + 197461366195.

It is an arithmetic number, because the mean of its divisors is an integer number (197461366195).

Almost surely, 2^394922732389 is an apocalyptic number.

It is an amenable number.

394922732389 is a deficient number, since it is larger than the sum of its proper divisors (1).

394922732389 is an equidigital number, since it uses as much as digits as its factorization.

394922732389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35271936, while the sum is 61.

The spelling of 394922732389 in words is "three hundred ninety-four billion, nine hundred twenty-two million, seven hundred thirty-two thousand, three hundred eighty-nine".